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  Computer won't power on 
 Date Written 
Steven Hill Aug 13, 2012, 09:53pm EDT Reply - Quote - Report Abuse
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I recently moved to a new apartment. When I hooked up my computer at the new place it turned on just fine and everything worked like normal. I left the room and came back about 15 minutes later and my computer was powered off, and could not be turned back on.

I have tried switching power cords and none of them do anything differently.

The only light that comes on is the power button on the mother board. It flashes a red light every couple of seconds. The mouse flashes its light also. No fans or case lights or anything else comes on.

Is this a common sign of something? Is the power supply dying all of a sudden and not putting enough power out?

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john albrich Aug 13, 2012, 11:09pm EDT Reply - Quote - Report Abuse
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Edited: Aug 13, 2012, 11:18pm EDT

>> Re: Computer won't power on
Parts that have shifted during a move are a not uncommon cause of failures that are discovered immediately after moving a computer (whether room-to-room or inter-continental). It's possible that the computer will work after the issue is resolved, however it's also possible any of these items could cause catastrophic damage if the computer is plugged-in to AC mains before being corrected.

Here are some of the more obvious things for which to look after a move and before connecting the computer to AC mains...

Open the case and verify everything is properly seated and connected. Visual inspection may be insufficient (e.g. a card (videocard, RAM module, etc) may look properly seated but in fact has shifted slightly). If you know what you are doing, consider unplugging and reseating the various components and connectors in the computer.

Also look for loose items in nooks, crannies, and the "floor" of the case.

Moving can even cause a motherboard or other component to shift on the mounting screws and can result in a short-circuit to the case or other component.

Check to make sure the CPU cooling assembly has not detached or shifted from CPU. This will likely be OK as long as the cooling assembly's mounting lever, cam, and mounting screws appears to be in the proper position (see manual and/or cooling assembly's mounting instructions) and the assembly can't be "wiggled" around. Check this gently. Don't use too much force here. You may also have to check to make sure the assembly's back mounting plate fasteners are all firmly in place and the plate hasn't shifted as that may cause a short-circuit on the backplane of the motherboard.

Look for "missing" screws as well. During a move screws can also be "popped" from their locations and end up bouncing around and ending up shorting something out. I've even found an adapter card bracket's case-mounting screw bouncing around inside a PSU (which I can't confirm came from a move, but seemed likely given the timing of the failure). The card was still in its socket and everything still "looked" OK. A wrong-size threads screw was used and so it wasn't properly held in place. Lesson from that was...unexpected things happen to cause failures.

If external devices (mouse, keyboard, memory stick, etc) were left connected during the move, it's also possible that the wires were "pulled" and caused stress on the connectors to the point where they were damaged. Look for signs of damage, connectors at odd angles, and try disconnecting/re-connecting each device. If it can't be reconnected the socket is likely damaged and may cause power-on problems.

Note: anytime the case is opened, and especially if you are working on any parts, connectors, etc., make sure you follow appropriate personal safety and ESD protocols.

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