Unugga Bixinta Korontadu^{(Power Supply Unit)} waa qayb muhiim ah oo ka mid ah dhammaan adeegayaasha si ay u shaqeeyaan caadiga ah ee kaabayaasha IT-ga. Maanta, ku dhawaad ​​nidaam kastaa wuxuu la yimaadaa PSU marka la iibsanayo. PSU si toos ah uma keento kombayutarkaga, maadaama ay u beddesho Alternating Current (AC) una beddesho Direct Current (DC) adoo isticmaalaya qaybihiisa gudaha. Haddii kombayutarkaagu aanu helin koronto ku filan ama PSUguuldareysto, waxaa laga yaabaa inaad la kulanto dhowr cawaaqib, sida laga yaabo in nidaamka uu noqdo mid aan xasilooneyn ama laga yaabo in kumbuyuutarkaagu uusan ka soo kicin liiska bilowga. Xaaladdan oo kale, waa inaad u tagtaa hababka tijaabada si aad u falanqeyso xaaladdeeda shaqo. Haddii aad isku dayeyso inaad sidaas sameyso, markaa waxaad joogtaa meesha saxda ah! Waxaan keenaynaa hage qumman oo kaa caawin doona inaad barato sida loogu tijaabiyo PSU multimeter. Markaa, sii wad akhriska si aad wax walba u ogaato si faahfaahsan.

Sida loogu tijaabiyo PSU Multimeter^{(How to Test PSU with Multimeter)}

Kahor intaadan baran sida loogu tijaabiyo PSU multimeter-ka, halkan waxaa ah qaar ka mid ah calaamadaha aad la kulanto marka Unugga Bixinta Korontadu^{(Power Supply Unit)} uu guuldareysto.

• Kombuyuutarku gabi ahaanba ma bootin doono^{(PC won’t boot at all)} : Marka ay cilad ka timaado Cutubka Korontada^{(Power Supply Unit)} , kombayutarkaagu si caadi ah uma bootin doono. Natiijo ahaan, nidaamku wuu ku guuldareysan doonaa inuu bilaabo, waxaana inta badan loo yaqaan kombuyuutar dhintay^{(dead computer)} .
• PC si aan kala sooc^{(PC restarts randomly or Shuts Down)} lahayn ayuu dib u bilaabo ama u xidhaa: Haddii PC-gaagu si aan kala sooc lahayn u bilaabo ama u xidhmo inta lagu jiro bilawga, waxay muujinaysaa fashilka PSU .
• Shaashadda Buluugga ah ee Dhimashada^{(Blue Screen of Death)} : Haddii shaashadda PC-gaagu ay buluug noqoto, waxaa jira fursado badan oo ah in PSU aysan ku jirin xaalad wanaagsan.
• Qaboojinta^(Freezing) : Marka ay shaashadda PC-gaagu barafto sabab la'aan la'aanteed muraayad buluug ama madow ah, waxaa laga yaabaa in dhibaato qalabeed halkan ka dhacdo.
• Lag and Sttuttering^{(Lag and Stuttering)} : Daahitaanka degdega ah iyo dhufashada ayaa ah dhibaatada ugu badan, taas oo aad ku xaqiijin karto hababka tijaabada.
• Cilladaha Shaashada^{(Screen Glitches)} : Tani waa mid ka mid ah sababaha ugu badan ee tilmaamaya in ay dhawaan dhimi doonto Unugga Korontada^{(Power Supply Unit)} .
• Qaylada Taageeraha^{(Noise from the Fan)} : Haddii kombayutarkaagu aanu shaqayn oo aad maqashid sawaxan sare, taageeruhuna uu ku socdo RPM-ka ugu sarreeya, hubi in nidaamka uu aad u kululaaday. Haddaysan ahayn, markaas waxay tusinaysaa in Qaybta Korontadu^{(Power Supply Unit)} ay fashilantay. Hubi in nidaamku aanu kulayl badan sabab la'aanteed.
• Kuleyl^{(Overheating)} ka badan : Kuleyl badan ayaa sidoo kale laga yaabaa inay calaamad u tahay waxqabadka liita ee Qeybta Korontada^{(Power Supply Unit)} .
• Qiiqa ama urta gubanaysa^{(Smoke or burning smell)} : Haddii Qaybta Korontadu^{(Power Supply Unit)} ay gebi ahaanteed dhimatay, waxa laga yaabaa inay soo saarto qiiq iyo ur gubanaya.

Talaabooyinka taxaddarka leh^{(Precautionary Steps)}

Marka aad xaqiijiso in aad khalad ka qabto PSU oo aad rabto in aad ogaato sida PSU loogu tijaabiyo multimeterka, dabadeed sii wad akhrinta qaybtan si aad cilad uga saarto ka hor intaadan raacin hababka tijaabada.

Habka 1: Ka saar Aaladaha USB & Disc^{(Method 1: Remove USB Devices & Disc)}

Haddii aad haysatid wax DVD^(DVDs) ah , saxannada is haysta , ama qalabka USB ee ku xidhan kombayutarkaaga, ka dib xidhidhkooda ^{(Compact Discs)}oo^(disconnect) dib u^{(reboot )} bilow kombayutarkaga . Waxaa lagugula talinayaa inaad ka saarto qalabka dibadda si taxadar leh si looga fogaado wax kasta oo lumin xogta.

1. Soco oo hel astaanta si badbaado leh uga saar Hardware oo^{(Safely Remove Hardware and Eject Media )} ka saar astaanta warbaahinta ee ku taal goobta shaqada.

2. Hadda, midig-guji astaanta^{(icon )} oo dooro^{(select )} aaladda dibadda aad rabto inaad ka saarto PC-gaaga.

3. Sidoo kale, ka saar dhammaan qalabka kale ee dibadda^{(external devices )} si ammaan ah nidaamka iyo reboot aad PC.

Habka 2: Ka saar Hardware Cusub^{(Method 2: Remove New Hardware)}

Waxaad isku dayi kartaa inaad goyso qalab kasta oo dibadda ama gudaha ah oo cusub iyo qalabyada ku hareeraysan ee aad dhawaan heshay. Haddii aad aragto kombuyuutarkaaga oo si fiican u shaqeynaya ka dib markaad ka saarto qalabka hardware, markaa qalabka cusubi waxa laga yaabaa inaanu la socon nidaamka.

Sidoo kale Akhri: ^{(Also Read:)} Sida loo Tijaabo Awood-siinta^{(How to Test Power Supply)}

Habka 3: Ka saar dhammaan fiilooyinka^{(Method 3: Disconnect all Cables)}

Haddii kombuyuutarku uusan lahayn koronto ku filan, waxaa laga yaabaa inaad la kulanto dhowr isku dhacyo adag si aad u xalliso. Xitaa haddii ay jiraan koronto joojin inta lagu jiro shaqadaada, shaqeynta asalka ah ee nidaamka ayaa dhibsan. Sidoo kale, haddii aad isticmaasho fiilada duugowday, dhaawacan, ama aan la isku halayn karin, xiriirku wuxuu sii wadi doonaa inuu ka go'o qalabka.

Xitaa haddii xawaaraha nidaamku aad u sarreeyo, ma heli doontid adeeg aan kala go' lahayn marka fiilooyinka la jabiyo. Hubi in fiilooyinka aysan waxyeelo gaarin iyo haddii aysan ku jirin xaalad wanaagsan, ka dibna ku beddel mid cusub ka hor intaadan ogaanin sida loogu tijaabiyo PSU multimeter.

1. Ka saar fiilooyinka korantada ee fiilooyinka korantada oo isku day inaad nidaamka ku xidhid meel gidaarka ah. Tani waxay shaqayn doontaa inta badan kiisaska.

2. Ka saar dhammaan fiilooyinka kale ee kombiyuutarka. Tusaale ahaan, waxaa laga yaabaa inaad leedahay a

• Fiilada VGA^{(VGA cable)} - fiilada loo isticmaalo in lagu xiro dekedda VGA ee kormeeraha kombiyuutarkaaga,^(VGA)
• Fiilada DVI^{(DVI cable)} - fiilada loo isticmaalo in lagu xidho dekedda DVI ee kormeeraha kombiyuutarkaaga,
• fiilada HDMI^{(HDMI cable)} - fiilada loo isticmaalo in lagu xidho dekedda HDMI ee kormeeraha kombiyuutarkaaga,
• PS/2 cable - fiilooyinka ku xira kumbuyuutarrada iyo jiirka PS/2 ee nidaamka),
• Xarkaha Ethernet^{(Ethernet cable )} - fiilada keena isku xirka shabakada nidaamka,
• Xadhkaha maqalka^(audio) iyo USB-ga^{(USB cables)} kale .

3. Fadlan^(Please) sug in muddo ah ka dibna dib ugu xidh^(connect) . Hubi inaad maqasho dhawaaq dhawaaqa caadiga ah markaad dib u bilaabayso PC.

Sidoo kale, xirayaasha ayaa ah qaybaha muhiimka ah ee fiilooyinka kuwaas oo looga baahan yahay isku xirnaanta saxda ah ee shabakada. Waa inaad had iyo jeer hubisaa in dhammaan xirayaasha nidaamka ay si adag ugu xiran yihiin fiilada oo ay ku jiraan xaalad wanaagsan. Ku beddel haddii ay waxyeello soo gaarto. Kadibna, ka saar dhammaan fiilooyinka.

Habka 4: Ka saar Dhammaan Kaararka Ballaarinta^{(Method 4: Disconnect All Expansion Cards)}

Kaarka ballaarinta sidoo kale waa kaarka adabtarada ama kaarka dheeriga ah ee loo isticmaalo in lagu daro hawlaha nidaamka iyada oo loo marayo baska ballaarinta. Tusaalooyinka kaadhadhka balaadhinta waxa ka mid ah kaadhadhka codka, kaadhadhka garaafyada, kaadhadhka shabakada, iwm. Dhammaan kaadhadhkan ballaadhinta waxa loo isticmaalaa in lagu wanaajiyo hawlaha hawlahooda gaarka ah.

Tusaale ahaan, kaadhka garaafyada ayaa loo isticmaalaa si kor loogu qaado tayada muuqaalka ciyaarahaaga, filimada, iwm. Mararka qaarkood, kaadhadhkan ballaadhinta waxa laga yaabaa inay kiciyaan dhibaato nidaamka. Sidaa darteed^(Hence) , ka saar dhammaan kaadhadhka ballaarinta nidaamka. Haddii habkani uusan xallinin arrinta, markaa waxaa fiican inaad tijaabiso hababka kale ee hoos ku xusan ka hor intaadan ogaanin sida loo tijaabiyo PSU multimeter.

Sidoo kale akhri: ^{(Also Read:)} Sida loo ogaado haddii kaadhka garaafigaagu dhimanayo^{(How to Tell If Your Graphics Card is Dying)}

Habka 5: Hawo-qaadka PC^{(Method 5: Ventilate PC)}

Cimrada kombayutarkaagu waa la dhimi doonaa marka aad bilowdo isticmaalka heerkulka sare. Kulaylka joogtada ah ayaa hoos u dhigi doona qaybaha gudaha iyo nidaamka sidoo kale. Marka nidaamka lagu kululeeyo heerkulka ugu sarreeya, taageerayaashu waxay ku wareegi doonaan RPM ugu sarreeya. Hase yeeshee, nidaamku waxa laga yaabaa in aanu hoos u dhigin heerka loo baahan yahay. Xaaladdan oo kale, GPU -gu wuxuu kobcin doonaa kuleyl badan, taasoo u horseedaysa Xaraashka kuleylka^{(Thermal Throttling)} . Halkan, taageerayaasha iyo nidaamku waxay noqon doonaan kuwo aan awoodin inay hoos u dhigaan kulaylka.

Sidaa darteed^(Hence) , kaadhadhka balaadhinta ayaa yarayn doona waxqabadkooda si ay u dhaliyaan kulayl yar. Waxay u horseedi doontaa waxqabadka ugu xun ee PC-gaaga, iyo xaaladaha aadka u daran, kaararka ballaarinta waa la dili doonaa haddii heerkulku hoos u dhicin. Haddaba^(Hence) ,

1. Had iyo jeer hubi in nidaamka qaboojiso^{(keep the system cool)} oo aad ilaaliso hawo habboon^{(maintain proper ventilation)} .

2. Ka daa nidaamka shaqo la'aan in muddo ah^{(Leave the system idle for some time)} marka uu kulayl badan yahay ama ka dib isticmaalka joogtada ah.

3. Ku dar habab qaboojin oo wanaagsan^{(Add better cooling systems)} haddii kombuyuutarku ay waxyeelo gaarsiiyeen fiilooyinka socodka hawada iyo kor u qaadista boodhka.

Habka 6: Ilaali Nadiifinta iyo Hawo-mareenka^{(Method 6: Maintain Clean and Ventilated Ambience)}

Agagaarka aan nadiifka ahayn ayaa sidoo kale laga yaabaa inay gacan ka geysato waxqabadka liidata ee nidaamka sababtoo ah ururinta boodhka ayaa xannibi doona hawo-qaadista kombiyuutarka. Waxay kordhin doontaa heerkulka nidaamka, sidaas darteed dhammaan qaybaha gudaha, oo ay ku jiraan Unugga Bixinta Korontada^{(Power Supply Unit)} ayaa laga yaabaa inay dhaawacmaan, taasoo keenta in nidaamka uu shil dhaco mararka qaarkood.

1. Nadiifi hawo-mareenka^{(Clean the vents)} kormeeraha oo hubi in ay jirto meel ku filan hawo-siin habboon.

2. Iska ilaali inaad PC-gaaga dul dhigto meel jilicsan^{(soft surface)} sida barkimada oo kale. Waxay ka dhigi doontaa nidaamka inuu hoos u dhaco oogada oo xannibo hawo-qaadista hawada.

3. Waxaad isticmaali kartaa nadiifiyaha hawada cufan^{(compressed air cleaner)} si aad u nadiifisid hawo-mareenada ku jira nidaamka. Ka digtoonow inaad dhaawacdo wax kasta oo gudaha ah oo ku jira.

Haddii hababka cilad-raadinta sare midkoodna shaqayn, sii wad akhrinta si aad u barato sida loogu tijaabiyo PSU multimeter.

Habka 7: Ka saar oo ku xidh RAM iyo CPU^{(Method 7: Disconnect and Connect RAM and CPU)}

Haddii hababka kore midkoodna uusan shaqayn, isku day in aad CPU iyo RAM -ka ka saartid Motherboard-ka. Sidoo kale, hubi haddii RAM uu ku habboon yahay PC-gaaga.

1. Ka saar CPU ka oo ka saar Motherboard-ka RAM -ka.^(RAM)

2. Daqiiqado ka dib, ku xidh CPU^{(CPU )} ka dibna RAM ku geli Motherboard-ka.

3. Hubi in RAM , CPU , iyo Motherboard-ku si fiican u shaqaynayaan. Haddii ay jiraan arrimo la xidhiidha, la xidhiidh xarunta dayactirka xirfadlayaasha ama beddel haddii loo baahdo.

Sidoo kale akhri: ^{(Also Read:)} Immisa RAM ayaan u baahanahay Windows 10^{(How Much RAM Do I Need for Windows 10)}

Ku samee Imtixaanka PSU Multimeter^{(Perform PSU Test with Multimeter)}

Haddii aad si sax ah ufuliso tillaabooyinka aad ku tijaabinayso PSU multimeter, waxaad xaqiijin kartaa haddii ay dhibaato ka jirto Qaybta Korontada^{(Power Supply Unit)} oo beddel haddii loo baahdo.

Fiiro gaar ah:^{(Note: )} Tallaabooyinkan hoos ku xusan waxaa lagu muujiyey iyadoo la adeegsanayo sahay koronto oo ATX ah^{(standard ATX power supply)} .

1. Qaado dhammaan hababka^(methods) taxaddarka ee kor ku xusan ka hor intaadan gacanta ku tijaabin PSU multimeter.

Fiiro gaar ah:^{(Note: )} Ha ka boodin tallaabadan maadaama aad la tacaaleyso koronto koronto oo sareysa.

2. Xir^{(Shut down)} PC-gaaga, oo ka saar dhammaan fiilooyinka. ^{(cables. )}Hubi^(Make) inaad wax walba ka saartay nidaamka.

3. Kumbiyuutarkaaga dhig meel fidsan oo aan joogsanayn^{(non-static flat surface)} . Fur sanduuqa kombayutarka oo ku rogo daminta dhabarka dambe ee PSU .

4. Hadda, ka saar dhammaan xiriiriyeyaasha korontada^{(power connectors)} ee ku xiran qaybaha gudaha.

5. Ka dib markaad xidhidhiyeyaasha ka jarto, ku koox iyaga iyo fiilooyinka korantada si ay u sii wadaan tijaabada si hufan.

6. Qaado silig oo ku xidh biinanka 15 iyo 16 xidhiidhiyaha awooda Motherboard-ka ee 24-pin ah^{(24-pin motherboard power connector)} . U isticmaal miiska tixraacaada.

Pin	Name	Wire Color	Description
1	+3.3V	Orange	+3.3 VDC
2	+3.3V	Orange	+3.3 VDC
3	COM	Black	Ground
4	+5V	Red	+5 VDC
5	COM	Black	Ground
6	+5V	Red	+5 VDC
7	COM	Black	Ground
8	PWR_ON	Gray	Power Good
9	+5VSB	Purple	+5 VDC Standby
10	+12V1	Yellow	+12 VDC
11	+12V1	Yellow	+12 VDC
12	+3.3V	Orange	+3.3 VDC
13	+3.3V	Orange	+3.3 VDC
14	-12V	Blue	-12 VDC
15	COM	Black	Ground
16	PS_ON#	Green	Power Supply On
17	COM	Black	Ground
18	COM	Black	Ground
19	COM	Black	Ground
20	NC	White	-5 VDC (Optional – Removed in TX12V v2.01)
21	+5V	Red	+5 VDC
22	+5V	Red	+5 VDC
23	+5V	Red	+5 VDC
24	COM	Black	Ground

7. Waxaad u dejin kartaa danabka sahayda korontada si waafaqsan dalkaaga xagga dambe ee PSU adiga oo akhrinaya liiska tamarta iyo soo noqnoqda (Hz) ee adduunka oo dhan^{(list of voltages and frequencies (Hz) around the world)} .

8. Hadda, ku xidh qalabka korontada^{(Power supply )} godka gidaarka.

9. Ku rogo furaha dambe ee PSU si aad u shido. Hadda, hubi haddii taageeruhu uu bilaabo inuu miiqayo, haddii uu sameeyo, ka dibna sii wad tallaabooyinka soo socda. Haddii taageeruhu uusan miiqin, markaas PSU waa khalad, waana inaad beddeshaa.

Fiiro gaar ah:^{(Note: )} Qaybaha Quwadda Korontada^{(Power Supply Units)} qaarkood waxa laga yaabaa in aanay badhan ku lahayn gadaasha. Sidaa darteed^(Hence) , kiiskan, taageeruhu wuxuu bilaabaa inuu miiqiyo isla marka aad cutubka geliso gidaarka si aad ugu tijaabiso PSU multimeter.

Sidoo kale akhri: ^{(Also Read:)} Sida loo Isticmaalo Kormeeraha Waxqabadka ee Windows 10 (Hage faahfaahsan)^{(How to Use Performance Monitor on Windows 10 (Detailed GUIDE))}

10. Qaado multimeterka^{(multimeter )} oo u rog goobta VDC (Volts DC) .

Fiiro gaar ah:^{(Note: )} Haddii aysan jirin sifo toos ah oo kala duwan oo ku taal multimeterka, ka dib u hagaaji qiyaasta 10.00V .

11. Waxaad haysataa laba baarayaal ku jira multimeter-ka. Baaritaanka Madow^{(Black probe )} waa baaritaanka taban, baaritaanka casna^{(red probe )} waa baaritaanka togan. Ku xidh baaritaanka madow biinanka dhulka madow kasta. 

12. Hadda, ku xidh baadhitaanka togan biin kasta oo danab u sita xidhiidhka Motherboard-ka ee 24-pin ah. ^{(24-pin motherboard power connector. )}Xaqiijinta sahayda korantada ee biinankaan waxay xaqiijin doontaa haddii koronto ka jiro biin kasta.

Fiiro gaar ah:^{(Note: )} +3.3 VDC , +5 VDC , -5 VDC (ikhtiyaar), +12 VDC , iyo -12 VDC xadhkaha korantada ayaa ku dhex jira biinanka.

13. U fiirso akhrinta mitirka badan^{(multimeter readings)} oo hubi in qiimayaashani ay hoos yimaadaan heerka dulqaadka, sida hoos lagu sharaxay.

Voltage Rail	Tolerance	Minimum Voltage	Maximum Voltage
+3.3VDC	± 5%	+3.135 VDC	+3.465 VDC
+5VDC	± 5%	+4.750 VDC	+5.250 VDC
+5VSB	± 5%	+4.750 VDC	+5.250 VDC
-5VDC (if used)	± 10%	-4.500 VDC	-5.500 VDC
+12VDC	± 5%	+11.400 VDC	+12.600 VDC
-12VDC	± 10%	-10.800 VDC	– 13.200 VDC

14A. Haddii qiyamka danabku aysan hoos imaanin xadka loo dulqaadan karo, waxay muujineysaa fashilka PSU , waana inaad beddeshaa.

14B. Haddii qiyamka danabku hoos yimaadaan qiyaasta loo dulqaadan karo, markaa waxaad sii wadi kartaa tijaabinta culeyska.

15. Ku rogo furaha dambe ee PSU si aad u damiso oo aad gidaarka uga jarto.

16. Ka saar siliga^{( wire )} aad ku xidhay xidhiidhiyaha Motherboard-ka ee 4-pin ah^{(4-pin motherboard power connector)} .

17. Hadda, dib u xidh dhammaan qaybaha gudaha.^{(internal components. )}

18. Marka xigta, shid Unugga Bixinta Korontada^{(Power Supply Unit )} adiga oo ku rogaya shisheeyaha dhabarkiisa iyo korontada PC-ga.

Xusuusin:^{(Note: )} Waad shidi kartaa PC-ga la'aanteed kiiskiisa. Gebi ahaanba waa badbaado in lagu shaqeeyo iyada oo aan lahayn kiis kumbiyuutarka. Si kastaba ha noqotee, haddii kombuyutarkaaga uusan shidin la'aantiis, waa inaad u dhaqaaqdaa jumper-kiisa ku habboon Motherboard-ka.

19. Ku celi tillaabooyinka 11-13^{( Steps from 11-13)} oo leh koronto kale oo hubi in qiyamka korantada ee la duubay ay hoos yimaadaan qiyaasta loo dulqaadan karo ( Tixraac^(Refer) shaxda Tallaabada 13^{( Step 13)} ). Haddii qiimaha la duubay uu aad uga fog yahay xadka loo dulqaadan karo, waa inaad beddeshaa PSU .

20. Kadib marka aad bedesho PSU-da khaldan ama^(PSU) haddii PSU aysan wax dhibaato ah ku qabin, dami PC-ga oo ku dabool kumbuyuutarka kiiskiisa.

21. Hadda, shid PC-gaaga oo hubi haddii dhibaatadu weli jirto, haddii ay haa tahay, dabadeed isku day inaad xalliso dhibaatada maadaama PSU aysan hadda keenayn arrinta.

lagu taliyay:^{(Recommended:)}

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• Hagaaji Kiiboodhka Makaaniga ah ee Laba jeer ku qora gudaha Windows 10^{(Fix Mechanical Keyboard Double Typing in Windows 10)}
• Hagaaji WD My Passport Ultra Laguma Ogaanin Windows 10^{(Fix WD My Passport Ultra Not Detected on Windows 10)}
• Hagaaji Windows 10 DisplayPort ma shaqeynayo^{(Fix Windows 10 DisplayPort Not Working)}

Waxaan rajeyneynaa in hagahan uu waxtar lahaa oo aad baratay sida loogu tijaabiyo PSU multimeterka^{(how to test PSU with multimeter)} iyo sida loo xalliyo dhibaatooyinka la xiriira PSU. Haddaba aan ogaano sida maqaalkani u caawiyay. Sidoo kale, haddii aad hayso wax su'aalo ah / soo jeedin ah oo ku saabsan maqaalkan, ka dib waxaad xor u tahay inaad ku riddo qaybta faallooyinka.

How to Test PSU with Multimeter

The Power Supply Unit is an essential сomponent of all servers for the normal functionality of the IT infrastructure. Today, almost every system comes with a PSU during purchase. Τhe PSU does not deliνer direct power to your computеr, as it converts Alternating Current (AC) to Direct Current (DC) by using its internal components. If your computer does not obtain an adequate power supply or the PSU fails, you might face several consequences, like the system may become unstable or your computer might not boot from the start menu. In this case, you have to go for testing methods to analyze its working state. If you are trying to do so, then you are at the right place! We bring a perfect guide that will help you learn how to test PSU with multimeter. So, continue reading to know everything in detail.

How to Test PSU with Multimeter

Before getting to know how to test PSU with multimeter, here are some of the signs you face when the Power Supply Unit fails.

• PC won’t boot at all: When there is a problem with Power Supply Unit, your PC will not boot normally. As a result, the system will fail to start, and it is often termed a dead computer.
• PC restarts randomly or Shuts Down: If your PC restarts randomly or shuts down during the start-up, it indicates a PSU failure.
• Blue Screen of Death: If your PC screen turns blue, there are more chances that the PSU is not in good condition.
• Freezing: When your PC screen freezes for no reason without a blue or black screen, there might be a hardware problem over here.
• Lag and Stuttering: Sudden lag and stuttering is the most common problem, which you can confirm through the testing methods.
• Screen Glitches: This is one of the most common reasons that indicates soon to be dead Power Supply Unit.
• Noise from the Fan: If your PC is idle and you hear high noise, and the fan is running at the highest RPM, check if the system is overheated. If not, then it indicates the Power Supply Unit is failing. Ensure the system is not overheated without any reason.
• Overheating: Excessive overheating might also be a sign of the poor performance of the Power Supply Unit.
• Smoke or burning smell: If the Power Supply Unit is entirely dead, it might expel smoke along with a burning smell.

Precautionary Steps

When you can confirm you have an error with PSU and want to know how to test PSU with multimeter, then continue reading this section to troubleshoot it before following the testing methods.

Method 1: Remove USB Devices & Disc

If you have any DVDs, Compact Discs, or USB devices connected to your PC, then disconnect them and reboot your computer. You are advised to remove the external devices with intense care to avoid any data loss.

1. Navigate and locate the Safely Remove Hardware and Eject Media icon on the taskbar.

2. Now, right-click on the icon and select the external device you want to remove from your PC.

3. Likewise, remove all other external devices safely from the system and reboot your PC.

Method 2: Remove New Hardware

You can try disconnecting any new external or internal hardware and peripheral devices you got recently. If you find your computer working well after removing the hardware devices, then the new hardware may not be compatible with the system.

Also Read: How to Test Power Supply

Method 3: Disconnect all Cables

If the computer does not have enough power supply, you might face several difficult conflicts to resolve. Even if there are power interruptions during your work, the original functionality of the system is disturbed. Also, if you use an old, damaged, or unreliable cable, the connection will keep disconnecting from the device.

Even if the system speed is very high, you will not get uninterrupted service when the wires are broken. Ensure the wires are not damaged and if they are not in optimum condition, then replace them with a new one before knowing how to test PSU with multimeter.

1. Plug out the power cables from the power strip and try connecting the system to a wall outlet. This will work in most cases.

2. Disconnect all the other cables from the computer. For example, you may have a

• VGA cable – the cable that is used to connect the VGA port of the monitor to your computer,
• DVI cable – the cable that is used to connect the DVI port of the monitor to your computer,
• HDMI cable – the cable that is used to connect the HDMI port of the monitor to your computer,
• PS/2 cable – cables that connect keyboards and mouse on PS/2 ports of the system),
• Ethernet cable – cable that brings network connection to the system,
• Other audio and USB cables.

3. Please wait for some time and then connect them back. Ensure you hear a typical beep sound while restarting the PC.

Likewise, connectors are essential components of cables that are required for proper network connectivity. You should always ensure that all the connectors in the system are tightly held up with the cable and are in good condition. Replace them if they are damaged. Then, disconnect all the cables.

Method 4: Disconnect All Expansion Cards

An expansion card is also an adapter card or accessory card used to add functions to the system through the expansion bus. Examples of expansion cards include sound cards, graphics cards, network cards, etc. All these expansion cards are used to improve the functionalities of their specific functions.

For instance, a graphics card is used to enhance the video quality of your games, movies, etc. Sometimes, these expansion cards might trigger a problem in the system. Hence, disconnect all the expansion cards from the system. If this method didn’t fix the issue, then it is better to try other methods mentioned below before knowing how to test PSU with multimeter.

Also Read: How to Tell If Your Graphics Card is Dying

Method 5: Ventilate PC

The lifespan of your PC will be reduced when you start using it at high temperatures. Constant overheating will wear down the internal components and the system as well. When the system is heated to the maximum temperature, the fans will spin at the highest RPM. Yet, the system may not cool down to the required level. In this case, the GPU will develop a load of heat, leading to Thermal Throttling. Here, the fans and the system will become incapable of lowering the heat.

Hence, the expansion cards will reduce their performance to generate less heat. It will lead to the worst performance in your PC, and in extreme cases, the expansion cards will get killed if the temperature does not decrease. Hence,

1. Always ensure to keep the system cool and maintain proper ventilation.

2. Leave the system idle for some time when it is subjected to overheating or after continuous usage.

3. Add better cooling systems if your computer has damaged air flow cables and dust build-up.

Method 6: Maintain Clean and Ventilated Ambience

Unclean surroundings might also contribute to the poor performance of the system since the accumulation of dust will block the ventilation to the computer. It will increase the temperature of the system, and thereby all the internal components, including the Power Supply Unit might get damaged, causing the system to crash sometimes.

1. Clean the vents of the monitor and ensure there is enough space for proper ventilation.

2. Avoid placing your PC on a soft surface like pillows. It will make the system sink into the surface and block the air ventilation.

3. You can use a compressed air cleaner to clean the vents in the system. Be careful not to damage any internal components in it.

If none of the above troubleshooting methods worked, continue reading to learn how to test PSU with multimeter.

Method 7: Disconnect and Connect RAM and CPU

If none of the above methods work, try disconnecting the CPU and RAM from the motherboard. Also, check if the RAM is compatible with your PC.

1. Disconnect the CPU and remove RAM from the motherboard.

2. After a few minutes, connect the CPU and insert RAM back into the motherboard.

3. Check if the RAM, CPU, and motherboard are working well. If there are any associated issues, contact a professional repair center or replace them if necessary.

Also Read: How Much RAM Do I Need for Windows 10

Perform PSU Test with Multimeter

If you correctly execute the steps to test PSU with multimeter, you can confirm if there is a problem with the Power Supply Unit and replace it if needed.

Note: The below-mentioned steps are demonstrated using a standard ATX power supply.

1. Take all the above precautionary methods before you manually test PSU with multimeter.

Note: Don’t skip this step since you are dealing with high voltage electricity.

2. Shut down your PC, and unplug all the cables. Make sure you have disconnected everything from the system.

3. Place your computer on a non-static flat surface. Open the computer case and flip the switch off at the back of the PSU.

4. Now, disconnect all the power connectors that are connected to the internal components.

5. After you disconnect the connectors, group them along with the power cables to continue the test efficiently.

6. Take a wire and connect the pins 15 and 16 to the 24-pin motherboard power connector. Use the table for your reference.

Pin	Name	Wire Color	Description
1	+3.3V	Orange	+3.3 VDC
2	+3.3V	Orange	+3.3 VDC
3	COM	Black	Ground
4	+5V	Red	+5 VDC
5	COM	Black	Ground
6	+5V	Red	+5 VDC
7	COM	Black	Ground
8	PWR_ON	Gray	Power Good
9	+5VSB	Purple	+5 VDC Standby
10	+12V1	Yellow	+12 VDC
11	+12V1	Yellow	+12 VDC
12	+3.3V	Orange	+3.3 VDC
13	+3.3V	Orange	+3.3 VDC
14	-12V	Blue	-12 VDC
15	COM	Black	Ground
16	PS_ON#	Green	Power Supply On
17	COM	Black	Ground
18	COM	Black	Ground
19	COM	Black	Ground
20	NC	White	-5 VDC (Optional – Removed in TX12V v2.01)
21	+5V	Red	+5 VDC
22	+5V	Red	+5 VDC
23	+5V	Red	+5 VDC
24	COM	Black	Ground

7. You can set the power supply voltage according to your country at the back of the PSU by reading the list of voltages and frequencies (Hz) around the world.

8. Now, plug the Power supply into the wall socket.

9. Flip the switch at the back of the PSU to turn it on. Now, check if the fan starts to spin, if it does, then continue with the following steps. If the fan doesn’t spin, then the PSU is faulty, and you should replace it.

Note: Some Power Supply Units might not have a button at the back of them. Hence, in this case, the fan begins to spin as soon as you plug the unit into the wall to test PSU with multimeter.

Also Read: How to Use Performance Monitor on Windows 10 (Detailed GUIDE)

10. Take the multimeter and turn the setting to VDC (Volts DC).

Note: If there isn’t an auto-ranging feature on the multimeter, then fix the range to 10.00V.

11. You have two probes in the multimeter. The Black probe is the negative probe, and the red probe is the positive probe. Connect the black probe with any black ground pins. 

12. Now, plug in the positive probe with every pin that carries a voltage on the 24-pin motherboard power connector. Ensuring voltage supply across these pins will confirm if there is a power supply across each pin.

Note: +3.3 VDC, +5 VDC, -5 VDC (optional), +12 VDC, and -12 VDC voltage lines are inbuilt within the pins.

13. Note down the multimeter readings and make sure these values come under the tolerance level, as tabulated below.

Voltage Rail	Tolerance	Minimum Voltage	Maximum Voltage
+3.3VDC	± 5%	+3.135 VDC	+3.465 VDC
+5VDC	± 5%	+4.750 VDC	+5.250 VDC
+5VSB	± 5%	+4.750 VDC	+5.250 VDC
-5VDC (if used)	± 10%	-4.500 VDC	-5.500 VDC
+12VDC	± 5%	+11.400 VDC	+12.600 VDC
-12VDC	± 10%	-10.800 VDC	– 13.200 VDC

14A. If the voltage values do not come under the tolerable range, it indicates a PSU failure, and you have to replace it.

14B. If the voltage values come under the tolerable range, then you can continue testing with the load.

15. Flip the switch at the back of the PSU to turn it off and disconnect it from the wall.

16. Remove the wire you have plugged into the 4-pin motherboard power connector.

17. Now, reconnect all the internal components.

18. Next, turn on the Power Supply Unit by flipping the switch at the back of it and power on the PC.

Note: You can turn ON the PC without its case. It is entirely safe to operate without the computer case. However, if your PC does not turn on without its case, you have to move its appropriate jumper on the motherboard.

19. Repeat Steps from 11-13 with other power connectors and ensure that the voltage values recorded come under the tolerable range (Refer to the table in Step 13). If the recorded value falls too far away from the tolerable limit, you have to replace the PSU.

20. After you replace the faulty PSU or if the PSU had no problem, then turn off the PC and cover the computer with its case.

21. Now, turn on your PC and check if the problem still exists, if yes, then try troubleshooting the problem as the PSU is not causing the issue now.

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We hope that this guide was helpful and you have learned how to test PSU with multimeter and how to troubleshoot PSU-related problems. So let us know how this article helped. Also, if you have any queries/suggestions regarding this article, then feel free to drop them in the comments section.

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