I have a Compaw 6510b, working find till yesterday, when I had intermediate problems, it either didn't recolonize the power cord was plugged in or I'd get an HP smart adapter error about the plug not supplying enough power. Also while this was going on, I kept getting messages from windows stating it was safe to remove me network adapter. I checked it this morning and the problem seemed to be gone, so I shut it down and installed the processor and ram upgrade that arrived today, and after installing everything, it fails to boot, the power light doesn't even come on, to make sure it wasn't the parts I put in causing the problem I reinstalled all the old components, still the laptop is completely dead, no power, no lights no nothing.