my nephew has a old computer. it has ddr2 and a am2+ processor it had a single core semperon processor in it it had one stick of ram in it. it was a single 2 gig ram. i had the old processor that celery gave me with the msi board. it had a 2 gig and a 1 gig stick on it. put it all together and the fans come on and the power light also. the computer won't start up. the monitor won't come on and the mouse doesn't light up. there is no beeps from the motherboard. i pulled the processor back out and placed the old single core in. took out the other stick of ram out and still nothing. other than the ram i put back in no other changes. monitor is not hd. its a dell, with a serial cable for its connection. i know its junk but i want to give him something to use till he can get back to work. help!