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My desktop computer won't turn on. Power supply issue?

by ryno9964 / January 15, 2015 5:42 AM PST

Hello, my self-built desktop computer (which is only a year old, with two upgrades) decided to stop working this morning. When I woke up, it was fine, but I noticed that the LED on my mouse (which is always on) turned off. I tried to turn on the PC, but to no avail. I've plugged it into different sockets, lamp-tested the sockets, made sure breakers were working, but i get nothing. Is this an issue with my PSU, or my motherboard.

CPU: Intel Pentium G3220
MB: Biostar HiFi B85+
PSU: Rosewill 500w

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Clarification Request
Hard drive and MM CPU
by Knight2015 / February 5, 2016 2:45 PM PST

Im fixing a old pc but when i recontacted the hd to MM the power is dead but the funny thing when i dont contacted it it turns on

All Answers

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If you read Rosewill reviews
by R. Proffitt Forum moderator / January 15, 2015 7:41 AM PST

They are mixed. We can test almost all PC power supplies with a Volt Meter and the "Green Wire Test" (see google.)

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Have you contacted the PSU mfg...should still be under
by VAPCMD / January 15, 2015 10:16 AM PST


So fans don't turn on ?

No activity from the MB ?

No beeps ?


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Nope, nothing
by ryno9964 / January 16, 2015 4:09 AM PST

It's pretty much dead. I haven't contacted support yet, but i will pretty soon. Just a note: When i first woke up that day, it was fine, but i actually saw the mouse led turn off right when it happened! So, it;s not a result of me just screwing around with things i shouldn't be.

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50/50...but I hope it's the PSU,
by Oldartq / January 16, 2015 6:00 AM PST

It's lot easier to replace. But if anyone wants to bet, my money is on mobo being the bad guy. Sorry.

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could this be because
by James Denison / January 18, 2015 1:25 PM PST

you shoved an Intel processor in an AMD motherboard?

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Lol, but no.
by ryno9964 / January 19, 2015 12:53 AM PST
In reply to: could this be because

Well, my computer just started working again! I'm replying on it right now. Apparantly it might have have been a power issue after all. Now I can game in peace!

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Don't just let it go
by jimpoma / January 23, 2015 9:42 AM PST
In reply to: Lol, but no.

Sounds like it could be a thermal shutdown because of a heat condition of your CPU. Once the unit cools down it will function again but most likely will shut down again if it heats up. Check your CPU fan to make sure that it is functioning. By the way are you doing any overclocking of your CPU and or Memory?
It is also possible for the same fan and overheating problem with the power supply so also check that. It is not likely that it is the motherboard itself as you would not be up and running again. Even after it cooled down.

Good luck!

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Seems classic "bad caps" issue
by Willy / February 6, 2015 3:31 AM PST
In reply to: Lol, but no.

Bad caps can be anywhere on the PC to include the PSU. Also, PSU by themselves will act wonky and since you are a gamer that maybe attributing factor due to wear&tear and thermal stress. As the others offered similar insight, but swapping out a "ROSEWILL" PSU should be a well advised repair even if working now, that a classic systom of "bad caps".


Review the examples given and check your PC innards closely.

tada -----Willy Happy

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can be solved
by BettyMaldonado / February 5, 2015 6:26 PM PST

Well, yea if PC has been off of course power supply is the problem......... it is not a big issue because by replacing the plug point or connection it can be easily solved.........my computer just started working again! I'm replying on it right now. Sudden shutdown is occurred due to the thermal shutdown of the CPU...........Once CPU cools down the system will starts functioning again..........Check your CPU whether is it working or not?
If, still after clearing all these problems if the system is not working then the problem will be in its motherboard. Replacing of motherboard is the only solution..............

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