Connect with us

Computer PSU failure - voltages low - damage sustained?

Discussion in 'Troubleshooting and Repair' started by seanspotatobusiness, Jan 17, 2015.

Scroll to continue with content
  1. seanspotatobusiness

    seanspotatobusiness

    193
    4
    Sep 11, 2012
    A couple of weeks ago my computer would not boot (the fans all started but the power LED appeared to flicker). I measured some of the PSU (Thermaltake 705w 700 W, now eight years old) voltages and the 12 V output was 10.3 V and the 5 V output was 3.5 V. This is far outside of specification. I bought a new PSU (XFX TS 750 W - more than adequate), however the PC will not boot. I don't have a speaker connected to the motherboard so I have ordered one so I can hopefully get a beep code.

    In the mean time I was wondering whether anyone could advise on:
    • the probable mode of failure of the PSU (now eight years old; I've opened and inspected it and can't see any obvious damage).
    • the possible damage sustained by the other components (I was under the impression that under voltage was not a risk but now I'm not so sure).
    At least with the new PSU the power LED isn't flickering but that's the only discernible difference at the moment.
     
  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,270
    Nov 28, 2011
    What do you mean exactly? Are you saying that the rail voltages are still wrong with the new power supply?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-