Question about Compaq (388746-001) (  388746-001) Motherboard

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Compaq Presario 4400us

The computer originally would not power up. So I purchased the correct power supply and installed it. Now the symptoms are: Plug power cord in power supply and the power comes on immediately with out pushing power button. Only the CPU fan comes on and the power light is red (bad) not Green (good). You can hear the harddrive spin up but nothing else happens. No video. No POST beeps. Nothing. If you push the power button nothing happens. When you Push and hold the power button for more than 4 seconds the Harddrive LED lights solid and the CD drive lights green solid along with power light stays Red and CPU fan stays on. After this if you push the power button the Hardrive and CD LED's go out Power light stays Red and CPU fan stays on. Power can not be turned off except by unplugging Power cord. Anyone see this before. Fried motherboard or CPU?

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  • Allen Ives Jun 22, 2007

    Thanks for the reply. I am pretty sure it is not the PS because I tried two of them and they both give the same symptom. And prior to this the computer would reset by itself every two weeks or so. I will see if I can scrounge around for another motherboard and try it.

  • Manuel213 Nov 16, 2007

    same problem here...the current power supply when plugged in only gives off a light hiss, So I replaced power supply with new one and now as soon as I plugg in the power cord cpu fan goes on and cd drive lights up but thats it. Front power button does nothing but flash yellow at the begining. Hard drive spins but there is no boot of any kind. I have to unplugg power cord to turn off. MotherBoard or CPU?? What can I try next?

  • Anonymous Mar 30, 2014

    power brick and xbox both have green lights when i hit the power button it bings and then goes off and the power brick turns red light on

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  • Compaq Master
  • 1,314 Answers

Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.

Posted on Jun 21, 2007

  • Kevin Shafer
    Kevin Shafer Jun 30, 2009

    Then why the bad rating? If you had included that information in your original post, we could have searched for something else.

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