You might have a problem with the memory modules. They can sometimes loose contact when the PC is moved. You can remove them and gently clean the contacts with a clean/new pencil eraser. Be careful to not touch the contacts with your fingers.
BIOS chips do not burn out. They seldom have problems unless you attempt and fail with a BIOS update. The BIOS programs are custom made to work with the EXACT hardware that is on the motherboard.
A replacement BIOS would probably cost more that a new motherboard.