I've been trouble shooting a dell dimension e520 desktop computer. Sometime is hangs at bios screen. Ive been told that it is a hard drive malfunction, I suspect that the bios firmware needed an update and maybe an update of the chip set software as well. I did a test on the power supply with a multimeter and the reading came out well. It appeals to be booting up well now everything seems to be normal. I tested the hard drive and run a chkdsk on it too.
Just looking for a second opinion here thanks.