Solved

Computer won't start after working fine for months * update: it works now, though not ideal fix.

After running fine for almost a year, my computer- Amd 8320e, gigabyte r9 290x, gigabyte ud3p motherboard and an EVGA GQ 650w psu refuses to start. It is in a homebuilt case and I have tried disconnecting the power button and shorting the contacts with a screwdrive (this has worked reliably before) but you no avail. The contacts are live: I have checked the 5v difference across them- that disappears if the psu is turned off and draws o.5 milliamp when an ammeter is used between the two contacts. Does anyone have any idea on what is wrong? The psu doesn't seem to turn on when it should: the fans do nothing when turned on, despite eco mode being off.
Reply to selwonkak
10 answers Last reply Best Answer
More about computer start working fine months
  1. Sounds a lot like a PSU failure. Even a decent one can fail prematurely. I'd RMA the PSU or swap it out.
    Reply to DSzymborski
  2. How do I test if the psu is dead?
    Reply to selwonkak
  3. And if it is dead, how is it providing the 5v for the contacts- that drops to 0v when the psu is turned off?
    Reply to selwonkak
  4. selwonkak said:
    How do I test if the psu is dead?


    With paperclip test.

    Remove 24pin connector from motherboard.
    Take paperclip and bend into a U shape.
    Put one end of paperclip in pin 16 (green wire if PSU does not have all black wires)
    Then put it in any ground wire (black wire if PSU does not have all black wires)

    If your PSU turns on (and thus your hard drives and anything else direct connected to PSU) then the PSU is good. If not then it is bad.
    Reply to boosted1g
  5. When I do that, the computer peripherals turn on.
    Reply to selwonkak
  6. So the issue is the motherboard?
    Reply to selwonkak
  7. Paperclip test in no way garantees that the PSU is outputing all the correct voltages and can handle full load, but it proves it is not completely dead.

    With that said I would suspect the motherboard before I would suspect a GQ serries PSU that pases paperclip test.

    Remove everyhting and breadboard it, reseat all ram/GPU/etc, and reinsert all cables.
    If it still has no signs of life then I would try single stick of ram configuraiton
    Just because it is easier to get/borrow a new PSU then motherboard I would test that, and that at that point if still not working then RMA motherboard.
    Reply to boosted1g
  8. boosted1g said:
    Paperclip test in no way garantees that the PSU is outputing all the correct voltages and can handle full load, but it proves it is not completely dead.

    With that said I would suspect the motherboard before I would suspect a GQ serries PSU that pases paperclip test.

    Remove everyhting and breadboard it, reseat all ram/GPU/etc, and reinsert all cables.
    If it still has no signs of life then I would try single stick of ram configuraiton
    Just because it is easier to get/borrow a new PSU then motherboard I would test that, and that at that point if still not working then RMA motherboard.


    I tend to recommend keeping an extra, basic power supply (something like an FSP) around for this reason. When the solution isn't obvious, I'm a fan of doing the less obnoxious swapout first.
    Reply to DSzymborski
  9. At the moment, I can't test any new parts: I have no spares new enough to work with the system, and live a long way from any shops that sell computer parts.
    Reply to selwonkak
  10. Best answer
    Update: Previously i had noticed that the connector wasn't sitting right down: as if some dirt was jamming it. blowing through the connector and forcing it on, while still not making it sit correctly, was enough to allow the computer to start (only just- the fans stuttered on/off for a second as if it was a loose connection), so I am considering it fixed until the connection doesn't work again (it becomes loose in the future).
    Reply to selwonkak
Ask a new question Answer

Read More

Computers Gigabyte