Non-responding K7S5A

Hi all,

I just put together a K7S5A system for a friend of mine. It worked fine except for I couldn't get the modem to work on it. So after trying to wrestle Windows ME into submission, I opened up the case and tried to stick the modem in a different PCI slot. The computer refused to boot after the change. I tried to put the modem back in the previous PCI slot but it didn't help. I don't recall seeing any sparks or anything else that could have cause a problem. I tested the video card in a different machine and it worked fine. When the power button is pressed, the disk drives spin up with no beeps but I get a blank screen with the monitor's power light blinking. I don't think there is a short because the motherboard would not have powered up and given juice to the various fans on the motherboard. I would really appreciated if some of you guy to give a me a clue to what could be wrong. I will next check the CPU to see if it is operational. I'm thinking maybe the BIOS got wiped out somehow. How would I go about reinstalling the BIOS on a dead system? Thanks!

Here's the system configuration:

Enermax CS-A1QX-06, 2-Tone, 9-Bay, 300W PS, P4, MID Tower Case
ECS K7S5A SiS® 735 SOCKET A MOTHERBOARD - RETAIL
AMD ATHLON THUNDERBIRD 1.4GHz 266MHz FSB Socket A PGA PROCESSOR Retail Box
2X256MB DDR2100 RAM (Kingston)
IMB Deskstat 60GXP, 60GB
Visiontek XTASY GeForce3 Ti 200 64MB
Plextor 16X10X40 CR-RW
Creative Modem Blaster V.90 PCI 56k Modem OEM Version
250MB Zip drive

p. s. We bought the Visiontek Ti 200 card from Bestbuy and when we opened up the package, the heatsink on one of the memory banks fell off. We exchanged it for another one but that too had the same problem (on the other memory bank!) They didn't have another one in stock and my friend wanted to get the system going so we bit our lips and kept the card and bought some thermal paste. However, this was unable to keep it glued on very effectively. What should we use to keep it on better and it this indicative of Visiontek quality control?

Have you tried clearing the CMOS?

Vafox

You can get the heatsink to stay on if you put a little dab of super glue[crazy glue] on each end.
You still need paste on the entire thing of course,but just leave the very edge clean on each side and apply the glue.

An update:

The computer booted up last night after a long period of non actvity and it booted up okay. However, when I tried to reboot the computer, it didn't come back up. Uggh. So got up this morning and it booted up again okay but once again refused to reboot. So, it appears that the computer don't like to reboot right away anymore. It likes to rest for several hours between boot ups. When I first put it together, we rebooted like crazy insatlling components and software. By the way, what will clearing the CMOS do for me? Would that help clear this problem? Help me ... thanks.
:(