|Unplugging it and putting it in another room, on it's own, won't cause your symptoms. |
You NEVER need to remove the heat sink from the cpu, unless it's heat sink has become unclamped to the mboard for whatever reason, assuming it has the proper thermal pad or thermal grease or thermal compound between the heat sink and the cpu, and the heat sink is sitting flat on the cpu. If the cpu was working fine before you moved it, there's nothing wrong with it's connection to it's socket.
You must have a poor connection somewhere on the mboard. Did you physically bump or jar the case while moving it ?
It's sounds like you're hearing a pattern of beeps that indicate no ram is installed, or a ram connection problem. You may get no video and the mboard may not boot fully when that happens.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.
Did you REMOVE the AC power to the case when you were fiddling with the ram and other connections ? If you didn't, you may have damaged something. ATX power supplies are always powering some places on ATX mboards, including some of the contacts in the ram slots, even when the computer is NOT running, as long as the PS is receiving live AC
If you have a video card in a mboard slot, is in all the way down in it's slot ?