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when i turn on my Computer it keeps restarting and i can't hear beeebs sound and i can't see the bios main menu (I just have a black screen), I have tried to change the power supply but nothing happend,and tried to change the RAM and also nothing happened ??!!! so please tell me what's the wrong with my computer ??
my motherboard is DG41RQ, 2GB of RAM, Dual core E5200 CPU, ATI radeon HD4350 graphic card, 320 GB Hard Disk !!!