Help with a Power Supply

I could use some help with what seems to be a BAD power supply. For the past month, I started to experience more and more frequent crashes of the system. About 2 weeks ago, I figured that it seemed to be the power supply and I started to use an external power supply for the 3 hard disk drives. That solved the problem and a few days ago, I replaced the internal power supply so that now the 3 hard drives are back on the new internal power supply with the rest of the system (and it is now very quiet again since the external power supply had a noisy fan!). Since I am not Tony Duell, I will just be tossing the old power supply. However, before that, I would like to know if there is a simple way to test the old power supply to determine if that was the actual problem? Please don't mention anything that requires me to open up the old power supply. I only have an old analog volt meter and could put a few light bulbs into a test circuit, but that is about the limit! It really is not that important, but it sure would be interesting to know if that was the specific problem. Sincerely yours, Jerome Fine -- If you attempted to send a reply and the original e-mail address has been discontinued due a high volume of junk e-mail, then the semi-permanent e-mail address can be obtained by replacing the four characters preceding the 'at' with the four digits of the current year.