Old but re-jigged computer wont POST
just got a new motherboard and RAM and set it all up with all my old equipment that used to work. Now the computer does nothing
All the fans are working and the little front LED is on but the monitor's LED remains on yellow and there's no beep from the motherboard.
I have double-checked the pins on the motherboard where the chip sits and no pins are bent.
The RAM is a single stick of 1GB DDR2 RAM 5300 unbuffered and the motherboard is a dual channel motherboard but I think it takes single sticks.
The motherboard is an Asrock G31M-S
I have stripped the computer down, leaving just the mobo in the chassis with the chip and associated fans. No hard drives, ROMS, or RAM.
Without the RAM, the mobo gives 3 short beeps on bootup meaning a failure of the RAM. Upon placing the RAM back into it's slot, nothing as before, just the fans spinning. I've tried both RAM slots and the same nothingness.
Any help would be highly appreciated.