As I couldn't get the computer to boot up with an old RAM 128mb + new 256mb, I put the original 128mb back in but it would still not boot up. I have a feeling I should be putting in 2 x 256mb (for the upgrade). But I don't understand why the computer would not boot up when I put the originals back in.
Not knowing what model of computer you are talking about, I'd suggest you try various combination's with your memory modules as some computers are picky and accept certain size memory chips in certain slots only. Furthermore, it could be there is a bad connection on the sockets or if you have not been ESD safe, you could have zapped the memory chips and or the main board.
my hp pavillion DV1000 randomly stopped turning on. the keyboard is a little damadged and dusty,...
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my hp pavillion DV1000 randomly stopped turning on. the keyboard is a little damadged and dusty, plus theres keys missing, so i am thinking it may be the power button itself, is there any way to test if this is the problem?