2 dead ram sockets. no display on other 2

Hello, im trying to rebuild a variety of graveyard computers i got for cheap parts.

the current problem child is an a8m2n-la motherboard with an athlon 64x2 3000+ cpu.

ram is a fresh outta the box ddr2 1gb stick from best buy.

power supply is questionable but i have nothing to test it against. model win-400ps. it was what was in the case already.

it has no power or rest switch hooked up.

when i flip the switch on the psu, the HD spins, the cpu fan spins, if the ram is in 2 of the sockets i get a single long beep every 3 secs. if ram is in either of the other 2 sockets. i get no beeps but everything still spins. oh and cpu fan spins at full speed.

any ideas?