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Why my computer startup just if I press the logic board?

Ones the computer is on, if i move it the mouse freeze and i need to restart. I open the computer to change the dc_sound board a month ago. Before that the computer works fine!!!!

I have replaced the screws and still de same. So works fine if i don´t move it!!1 And if i doesn´t start just press sone part on the motherboard and works fine.

Any solution?

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Most likely you have a screw floating around in the case on or under the board. Or maybe a cable just barely connected or loose board. Check carefully w/ a flashlight for these things. One thing you could try, take the new sound card out and see if it still locks up on you, it may be the sound card is defective, causing your problem. The other possibility is a crack or bad solder connection on the mainboard.

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