I recently purhcased 2 x 1gb of kingston memory which is the exact same ram as i have in my pc. Its a kingston ddr2 667 PC-5300. I have 2 x 1gb sticks in at present but when i installed the other 2 x 1gb sticks the PC loads up but the monitor does not turn on. Each memory stick works as a pair but not when you try with 3gb or 4gb. The serial number is exactly the same so there definitely compatible. Any suggestions?
When your pc starts normally you should get a single beep at the end of POST. If you get no beeps at all the speaker may not be connected. With no signal to the monitor using the beep codes will usually identify the fault.
Remove the graphics card and clean the slot (brush and blow) and do the same with the memory slots insert the memory make sure the matched pairs are inserted in the correct slots ie the first pair in the same coloured slots and the second pair in the other colour. then insert the graphics card and all should be well.
right done all that and still the same issue occurs. When i go back to 2gb everything works fine again so i cant see it being an issue with graphics card. Ive tried different combinations of the 1gb sticks and works fine its just when i try and put more than 2gbs on ram the problems occur.