I have an old pc with core2duo e7500 processor , asus P5KPL-AM/PS motherboard . I have a samsung spinpoint hdd which had bought with system. Now the hdd has been replace around 5 times. When a i receive replaced hdd from service centre , the replaced hdd wont last even a day. When i instal windows it instals correctly , after some time it wont boot at all , just a blank black screen. What could be the problem some say it is the fault of motherboard and advised to replace it . Some say it may have been caused by psu. It is indeed a crappy one just bought for $8. So is it the motherboard problem or psu problem. Also psu is full of dust.