System will no longer boot, and no safe mode??

When was the last time you set up the memory voltage and timings in BIOS.

Set the memory voltage to 2.0- 2.1v and timings to Mfg. specs (5-5-5-15 or 4-4-4-12) (You mean PC6400, not PC6200 like you posted). Set up the memory correctly in BIOS. Run memtest 86 and check for errors. If necessary, check each DIMM individually in slot 1.

Make a bootable CD here and run memtest86.

http://www.majorgeeks.com/Ultimate_Boot_CD_d4981.html

I'm back home and have had some time to play around with my system.
Here is everything I came up with:

Checked all connections inside and everything was fine.

Made sure memory was at stock settings in BIOS. I ran memtest 86 through twice and there were no memory problems.

I went in through win xp recovery console and ran CHKDSK at the DOS prompt. I got the message "The volume appears to contain one or more unrecoverable problems." Does this mean that the hard drive is corrupted or just the os? Either way I guess I am stuck doing a fresh install.

Any other ideas?

Thanks, unfortuneately I will have to wait until I get home from work again.

I tried everything I could with no luck. I finally sucked it up and decided to just do a fresh install. I have reformatted the drive and re-installed Windows XP. As I started the process of re-installing the apps the system eventually runs into the same problem. It will freeze up again and if I reboot it will go to the XP boot up screen and then it will go black and nothing happens. I have run through the install process three times with similar results.

Does this mean the hard drive is definitely physically corrupt? Wouldn't Windows noticed this when I reformatted the drive? Could it possibly something wrong with the Mobo? I would like to be able to isolate the problem for sure before I go out and spend any money on hardware.

Thanks for all the help.

I usually get through loading the drivers for the mobo and graphics card and downloading a firewall and anti virus. The most recent time it crashed was trying to install nero. The time before it crashed when installing sp2 for xp. The first time I think was after rebooting after the drivers, so it is not failing after any particular app or driver. After the most recent time I ran chkdsk/r and it said it found and fixed errors. I ran it through again to make sure it did not get any errors but when I exited and tried to reboot it still didn't work. The furthest I seem to get is after the xp load screen I will get a black screen with the hourglass which I can control with mouse but it never displays the desktop.

Would don't you slipstream SP2 into your Windows XP CD? Run diags on memory and hard drive.

Grumpy