775 LGA

Hello! I needed help with a 775 zotac nvidia i6100 motherboard, it only starts when I take out the battery, once turned on, it shows the bios screen, starts windows and after 2 minutes it turns off, it does not heat anywhere, the microprocessor either, The ram is correct, what can it be?

Should i get a q8400 or a l5410 xeon for my 775 machine to replace a e8400.