I need help with a acer aspire ax3400g that keeps on shutting down. Here are the specs: And Phenom X3 B75 3.00GHZ 3 Cores, 8gb ram, 1tb hdd and radeon hd 5450 with a 220w power supply. It shuts off if I'm in the bios or trying to install or windows or linux. Can someone please help me I would deeply appreciate it because I don't have anymore money to spend on computer parts.