What am I missing??
 

Working on one of "my kids" PC, and something is not working..

It is built on an A-open box with an Intel desktop motherboard D815EEA2.

667 mh Celeron processor.

3 sticks of memory.

All connections are built onto the mobo except the modem.

I have tested the processor, and the memory in my backup machine....the power supply runs very quiet---the fan on the procssor--ditto. Replaced the hard drive with
a known good one.

The problem is NO VIDEO, and no sound. What am I missing?? Just hoping it is not the mobo....is there any way of testing it??

thanks for any help---VG

You don't say that you have tried another monitor/cable

You don't say that you have tried another monitor/cable.
On POST do you get a single "beep"?

Once I had this problem and it turned out the the modem was bad and would not let the system boot - not even a POST beep. Did you try removing the modem?
Hope this helps.

modem has been removed...

no beeps when it fires up..

monitor and cable was replaced...

I know this machine worked in the past...

no beeps points to motherboard, power supply, or processer problem.
or an unconnected speaker :-)

does the monitor work on another computer?
If so try to install a video card from another,
at least long enough to see the bios settings.
you also might try to reset the bios
by useing the jumper re:the owners manual,
or removing the battery for a while.

have you used the Intel Chipset Software Installation Utility?
http://support.intel.com/support/mot.../cs-013041.htm

the tech specs are here if you need them
ftp://download.intel.com/support/mot...2/a4639902.pdf

hope this helps.

Thanks for all your help--looks like a bad mobo...VG

try removing and replacing components one at a time

Resetting the BIOS is a very good advice, maybe it has the onboard video disabled.