Hi I’m in need of help. I just got 2x1gb pc400 400mhz ram cards (My motherboard is a pc3200 heard its compatible) I put them in alone with my old ram. I booted up too my desktop and then got a blue screen saying Must shut down PC to protect from damaging it. At the bottom it said dumping physical memory. After waiting about 5min and nothing happening I held the Power button to shut down. After putting back in the old ram how it was it won’t power on at all almost like the power is unplugged. I tried the old ram again in different orders and such and no luck plez help 
