Is my main board dead?

I have an old Epox 8k7a+ running Win2K (over 2 years) and suddenly the video went out. When I rebooted, I found that it wasn't the video, but the main board seems stuck in boot mode (I get a POST LED code of "FF" which means the bios, the mobo or the ram ain't working). I took Epox tech support advice that it was "thermal cycling" causing something to unseat and tried reseating all chips - except BIOS because I don't have a tool for removing/inserting. I took out all peripherals and rebooted. It worked.

It worked and the whole machine (with peripherals added back in) worked fine for about a week. Then it happened again. I swapped RAM chips, it worked then it didn't. I removed everything, reseated, it worked. When I shut down, added all the peripherals (and got ready to do an incremental back up of all the data onto CDROM) it booted, but needed to add drivers and reboot. ON reboot it stuck in reboot again (no video and POST LED says "FF" ) and it hasn't worked since.

Is the main board dead? Probably. What else can I do to test it?

I have bought a replacement board (epox 8kra2+ with same basic config only newer) with the hope of replacing it and hooking up my RAID array (4 IBM 40GB hard drives in stiping) so I can recover data.

Should I keep trying to revive board so I can backup data or should I go ahead and replace the board and hope the new Highpoint RAID chip will read the old RAID array so I can get the last month's data?

Any help would be appreciated greatly!