Motherboard Doesn't Power up

By leolite1 ยท 6 replies
Sep 16, 2003
  1. Hi,

    I have this motherboard whose identity I havent yet been able to discover but basically it doesn't power up. It has a P-iii 450MHz CPU and I have verified that the CPU and power supply are good. What I found was that the power LED would glow and the CPU power fan would rotate for a 3 seconds. I took out the CPU and the LED/fan were on for 5-6 seconds longer but then went dead. Problem with the capacitors ??

    What could be wrong ? Any help would be appreciated.

  2. poertner_1274

    poertner_1274 secroF laicepS topShceT Posts: 4,172

    Make sure the PSU is connected tightly to the motherboard. If that is a loose connection it could be getting some power, just not enough.

    :wave: Welcome to TechSpot :wave:
  3. KenRyan

    KenRyan TS Rookie


    Did you ever find out what was wrong? This EXACT thing happened to me. The PSU was connected just fine. I even installed a new one to see if that was the problem and it wasn't. I put the old mobo back in and IT worked too. I see no obvious cracks or anything on ths brand new socket 370 Soyo mobo.

    Any help from anyone appreciated.

  4. StormBringer

    StormBringer TS Maniac Posts: 2,244

    do you have the CPU fan connected to the proper connector(some boards will refuse to boot or even power up if there is no fan connected to the CPU fan Connector, it is a safety feature) Are you sure the power button header is properly connected?
  5. KenRyan

    KenRyan TS Rookie

    No Power to Mobo?


    the computer was working fine in the afternoon whenI installed it. I loaded all the drivers, etc. Everything was cool until I decided to pull the mobo up and add a couple of screw posts under it where it was flexing, and then added a new soundcard. When I powered up after that, I got like 4 beeps, and then nothing. the only thing that happened when I hit the ppower button was the fan spun for a few seconds and stopped.

  6. Masque

    Masque TechSpot Chancellor Posts: 1,058

    Sounds like you may have shorted with one of those extra posts or cracked the board in handling. Have you checked for shorts near those posts?
  7. KenRyan

    KenRyan TS Rookie


    what would I be looking for? How can I check this?

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