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Comuter requires two attempts to start up


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#1
Rick37

Rick37

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My Soyo KT333 system has a problem starting. If I press the ON button, I get no POST, no beeps, no messages, just the fans running. To start the PC. I have to follow the following process starting from the computer completely off.

1. Press power button - Computer appears to start but does not POST or provide any beep codes

2. Hold the power button down until the system starts to power down

3. Release the power button

4. As the system shuts down, just before the fans and drives stop, press the power button.

5. System then starts normally and runs fine.

I have tried different memory, replacing the power supply, and removing the MB from the case (suspecting something was shorting) all to no avail.

Anyone have a suggestion on what to try next?

Edited by Rick37, 20 November 2005 - 02:28 PM.

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#2
Tyger

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Maybe the little CMOS battery? It's a simple, inexpensive thing that causes all kinds of problems.
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#3
Samm

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Welcome to G2G Rick37

Can you tell me what power supply you have please? i.e manufacturer & power rating in watts
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#4
Rick37

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My power supply is an AGI HP-300SN, a 300 watt supply. I tried switching out the CMOS battery and it didn't help. It was from another MB so it wasn't new.
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#5
Tyger

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This is a tough one. Can you give us any more indications, how did it all start? Have you been able to get into BIOS setup at all, to check the boot order and any other settings? Does the BIOS see the hard drive, and have you tried any kind of boot disk?
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#6
Rick37

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It is a puzzle. I bought a new power supply today, 450 watt. I still have the same problem. However, the computer did start up on the first attempt the second time I tried to start. On a subsequent attempt, I had to use the "two startup" procedure and the system got hung up with an NVidia driver error. That has caused me to question the video board. I believe the PC will not POST without a video card present so maybe I have a bad connection between the video card and the motherboard.
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