Solve : computer won't boot after taking memory out?

1.	Solve : computer won't boot after taking memory out?
Answer» I have an DELL Dimension 4500 that i tried to upgrade the memory in earlier TODAY. I got the memory in the mail, only after taking out the chip i had in the mobo, i realized i ordered the WRONG memory. So i stuck the old chip back in, but now it won't boot up. I get power but can't get anything to transfer over to the monitor, and it also sounds almost as if the fans INSIDE the comp are not working when i try and boot it up. Any help or suggestions would be greatly appreciated BigunnMake sure the old RAM is seated properly... Did you remove all power and TAKE anti-static measures when doing the above ? ?old memory is seated right and i did have all the power off. as far as anti static i dunno, it was a wood floored room, so figured i was fine. Its just throwing me off why the internal fans aren't coming on either

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