PC Problems – Power Supply or motherboard?
I am looking for help with an annoying PC problem. My PSU test results are: Purple: 5.02v Green: 5.00v** Grey: 5.10v on power on Red: 5.10v on power on Orange: 3.38v on power on* Yellow: 11.74v *This is the anomaly I can see. It is too low. What would this low voltage cause? ** Is Green too high? Orange is 0.07v when no power is connected (?) and 0.19v when off but power connected. I also measured the V on the power switch jumper. This read 0.93v. Is this too low? I measured the current by removing the AC cord, disconnect the power connectors and attaching the meter leads to green and black. After reconnecting the AC cord the reading was 0.14. So motherboard problem or PSU? Any ideas please message me! 
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25 Responses to “PC Problems – Power Supply or motherboard?”
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heh…. i had same problem with chieftec 360w…. and bought new psu (corsair) and still cant turn on computer
(
I had all the same symptoms and rectified the problem by installing a new CMOS battery.
totu i had the same problem but when i try to pull up the power supply wiring harness, my pc starts to run normal without any hassle.
omg that happened to my computer too! instead I bought a new one but we still have.
i got this many time
for me its easy.. just shutdown your computer unplug HDD, start your computer if you see some error just shutdown.Plug your HDD and start your computer.. its done. Work For me.. I Don’t know your.
@dyjohndy1989 power supply or motherboard?
i guess power supply.
Did yo try use the meeter to check the motherboard with a meter
happend with me, i cleaned my CPU cooler one day put it on power it on then it turned of i was like huh? then i realised the CPU cooler wasnt touching then it was fine.
i had the same problem when i overclocked my pc try to put the normal GHz and if ur computer doesent start then like take off the main cable witch goes to the PSU and wait about 10-20 sec and then it should go on….
I have a similar problem. It can be a bitch to get my computor up and running but when I manage to get the bios to start and everything the computor runs just fine (except for some minor few crashes when the amount of watts suddenly drops crazy and I have to restart the entire thing again.) I’ve ordered a new powersupply thing, but I’m scared that it might be something else, Could it be the motherboard or the CPU?
have the same problem with my comp!!! i turn it on, and it turns off, turns on then off!!! dnt kno wat to do???need help asap
man….just change the cooler….your processor is heating up to much and it turns off.Or change the cmos battery.Try starting the comp only with the basics components….And clean it up
hi i had the same problem wen i turned my pc on the xp sine came up then shut down how i fix it the power leeds the big block that conects to motherbord u have a green and a black wire cut them and twist them 2 gether be cause the motherbord tells the power suply 2 switch offthers only 1 green wire u carnt miss it and the black next 2 it hope this helps
Orange is just right. Orange connector = 3.3V
Green is just fine aswell. Your computer turns on when 5V travels from PWR_ON to GND (green to black). This is perfect.
Your computer is fine
EDIT ACTUALLY LET ME REWORK THAT COMMENT:
Orange is just right. Orange connector = 3.3V
Green is just fine aswell. Your computer turns on when 5V travels from PWR_ON to GND (green to black). This is perfect.
Your computer is fine except for your issues
For the BIOS default weirdness: You might have your jumper set to CMOS_CLEAR or something like that (Or your battery is dead. Replacement type: CR2032)
2nd. problem: could be the CMOS jumper too, or your PSU has a bad capacitor somewhere.
i think it is the power supply.
its prop the CPU is overheating
its the powersupply its because it is overloading so u need to upgrade to a 6oo watt or 400 this used to happen to me
it’s your motherboard buddy, if it dual boots like that, anyone with half a brain knows it’s the motherboard. Does you PSU have a Cmos?
Your board is dead, guarenteed
Did you ever get this sorted?
Try Changing your CMOS Battery, before you rule the board dead
it’s your mobo.. had the same problem. buy a new motherboard man..
More than likely the psu is not gewtting a power ok signal or the voltage dropps when powering on and it signals a safty shut off… check your cnonnections dissconect a drive and or just replace the psu with a diff one to see if it works.. if not your mobo is dead
I would try this :
1. Get a new CMOS battery
2. Try a new PSU (since this is easier to try than a new motherboard)
3. If that doesn’t do the job, your motherboard is dead.
yep fix your cpu fan that wil fix all problem,s