Presario s5300nx

I tried to upgrade my memory and now ther is no post and no monitor green light only yellow at boot Nothing happens except continuous repeated long beeps and they never stop. Replaced power supply and swapped a compatable 478 Cpu.An intel chip with a passive heatsink which has two spring type hold down clips has loosened rom the MB a few times and I have resoldered the u type connectors, IE poor design. I Pulled cmos battery and reinstalled it and at this point feel it must be the MB. If you can help me with this I would be grareful. Thanks Ray
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  1. So this happened when upgrading memory! Did you try it without the new memory before you started swapping out other parts?
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