Re: Problems with Dell Dimension 4600 Motherboard
I had a problem like this with my 2350. I took out all but one memory DIMM (it only holds two), reset the CMOS, and it powered up.
It's worth trying.
BTW have you installed a third party CPU heatsink and fan? Stock, the 4600 has a passive heatsink that is cooled by the case fan (which directs the airflow through a plastic shroud).