A client of ours just tried to put in two new sticks of 256K memory, replacing one 128 stick. After she did this, when she turned the pc on, she just gets a ringing noise and nothing happens, the pc doesnt boot. She tried replacing the old memory, and now is getting the same thing happen. I checked and the new memory is the same type as the old, it was ordered specially for the model pc she has. Does anyone know why this ringing is occuring with both the new and old memory? I have had this problem before, but only because the memory I bought was the wrong type. Thanks!!