Custom Search
Join the PC homebuilding revolution! Read the all-new, FREE 200-page online guide: How to Build Your Own PC!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
Results 1 to 2 of 2

Thread: CPU Fan spins - but no boot !

  1. #1
    Join Date
    May 2006
    Burton on Trent Staffordshire

    CPU Fan spins - but no boot !

    I am working on an old Compaq 5000 series PC (Athlon 1.3 Ghz, 256mb RAM, 40Gb HDD, CDRW & DVD Rom, 250W Compaq PSU)

    The PC simply cuts out after a variable amount of time. I had it working long enough to clean approx 500 pieces of spyware, cleaned out extraneous temp folders, defragged etc)

    Then it cut out, powered down but the front power light remains on, the CPU fan spins - the PSU fan has stopped spinning though ???

    I had a spare, identical PSU which I put in its place. The PC booted perfectly and remained up for about 10 minutes then cut out again.

    In both cases, once the cut out had occurred, the CPU fan spins and the PSU fan doesn't.

    Won't boot at all now. Power is obviously coming from the PSU else the CPU fan and lights wouldn't be on.

    If the mains cord is plugged into the PSU after it has completely powered down, the CPU fan spins and the power LED comes on without touching the power on button.

    Any ideas what might cause this behaviour ???

    Loathe to go out and buy a brand new PSU only to have it fried by something.

    Any pointers appreciated

  2. #2
    Join Date
    Nov 2001
    Wyoming Valley
    Check each PS as described here:

    If they're ok, then the MB may be bad. Check it for any bulging, leaking, or ruptured capacitors.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts