My custom built computer won't boot up?

November 4, 2015 at 10:29:11
Specs: Linux
Hi my compouter that I built a year ago won't boot up. It turns on but the fans and led lights on the case won't start running to signal that it's on and continue to Windows. I've had this problem before but after a day it starts working (sometimes even when I lightly smack the computer tower case). But now it's not working today. I opened up the case and replugged all the wires and it still would not boot up, just turn on.

I'm wondering if it's the power supply or some connection problem with the tower case lights/fans trying to connect to the motherboard and/or power supply? It's a Cosair 750w power supply box.

Any help is greatly appreciated!

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November 4, 2015 at 16:26:27
If things change when you tap the case it is almost certainly a connection problem of some sort. When it is running, gently moving or even tapping cables and connector ends with an insulated object (such as a toothbrush handle) can help show where the problem lies.

One thing you could try is powering off and using a soft pencil eraser on all edge connectors - sometimes the slightest movement can shift these onto oxide. RAM can be the culprit and after cleaning the edge connectors pull the sticks in and out a few times to clean the sockets. Same can go for video card if separate, and SATA power and signal connectors too.

Always pop back and let us know the outcome - thanks

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November 4, 2015 at 19:10:46
Take a look at the motherboard too. Sometimes the capacitors, especially around the cpu, may get a 'puffy' look to them and have dried residue on top indicating leakage. When they get that way operation can be spotty--sometimes it'll start up and sometimes it won't.

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