Help! Please! with Motherboard Install

[Kappy]

Problem: Newly installed motherboard. Never used. I push power button,
system starts to run for 2 to 5 seconds, then shuts down. Everytime.

This is an upgrade to an A7N8X with Athlon XP2800+ cpu and it has not
yet worked. I believe that I have installed everything correctly. The
memory is brand new KBYTE 512 2700. I have swapped power supplies and
memory with another computer. I have tried booting without the hard
drive attached, without the video card installed and with all other
cards installed and removed. I even swapped power switches. The video
card is a 2001 model year card by Vision Tek. I don't know the voltage,
but the red light on the motherboard is not lighting up to indicate a
problem. The power supply is rated at 250w.

I have not yet tried removing the cmos battery.

What could be causing this?

Thanks,

Robert

 

[Jan Alter]

Hi,

Everything I've ever read about using an Athlon says that one should use
a 300w PS. And that information goes back to when I put together an Athlon
900. I don't think the power requirements have gone down. I've heard folks
speak every now and then of a 250w but it's usually a quality PS to begin
with. I'd first start with a known good quality PS with everything else out
except the graphics card. I wouldn't even connect the hdd at this point. If
you still have a problem then change the RAM.
Good luck.

 

[Jan Alter]

I forgot to mention that you should definitely have a graphics card
installed or there won't be any chance of it starting, most likely at least
a 4x AGP.

 

[kony]

Problem: Newly installed motherboard. Never used. I push power button,
system starts to run for 2 to 5 seconds, then shuts down. Everytime.

This is an upgrade to an A7N8X with Athlon XP2800+ cpu and it has not
yet worked. I believe that I have installed everything correctly. The
memory is brand new KBYTE 512 2700. I have swapped power supplies and
memory with another computer. I have tried booting without the hard
drive attached, without the video card installed and with all other
cards installed and removed. I even swapped power switches. The video
card is a 2001 model year card by Vision Tek. I don't know the voltage,
but the red light on the motherboard is not lighting up to indicate a
problem. The power supply is rated at 250w.

I have not yet tried removing the cmos battery.

What could be causing this?

Thanks,

Robert

First guess is that the power supply is insufficient capacity.
Try a _NAME-BRAND_ 300-350W power supply.
You might also see if the board has a 100/133 FSB jumper and set that to
100MHz (think if it's there, jumper would be to the left of the
northbridge heatsink). Also try clearing the CMOS.

 

[Trent©]

Problem: Newly installed motherboard. Never used. I push power button,
system starts to run for 2 to 5 seconds, then shuts down. Everytime.

This is an upgrade to an A7N8X with Athlon XP2800+ cpu and it has not
yet worked. I believe that I have installed everything correctly. The
memory is brand new KBYTE 512 2700. I have swapped power supplies and
memory with another computer. I have tried booting without the hard
drive attached, without the video card installed and with all other
cards installed and removed. I even swapped power switches. The video
card is a 2001 model year card by Vision Tek. I don't know the voltage,
but the red light on the motherboard is not lighting up to indicate a
problem. The power supply is rated at 250w.

Try a 350w power supply.

I have not yet tried removing the cmos battery.

What could be causing this?

Check the voltage specs on the cpu...then make sure the board is
loading with those specs.


Have a nice week...

Trent©

Follow Joan Rivers' example --- get pre-embalmed!

 

[Kappy]

Turned out to be thermal protection. I turned the heat sink around 180
degrees and it works perfectly. Thank you all for your insight.