That size power supply could have been working at near it's limit for years.
Why not swap that or MEASURE all the rails with a Volt meter?
Hi all, I hope someone can help me here.
I have had a problem with an old PC for a while now. Basically one day it wouldn't boot up....I had power but nothing else. CPU Fan and Graphics fan worked. No Beeps. No power to CD / HD drives.
The other strange thing is the power supply switch now powers up the PC, i,e the front switch does not need to be pressed.
I have tried another working PSU. Swapped RAM, Swapped CPU to no avail so I decided as I was getting no beeps it must be the motherboard.
I have just installed a new board (exactly the same model) and I have exactly the same problem.
The PC still powers up fans but nothing else. Any ideas what this can now be??? I;m struggling big time. I have disconneced the from panel sw / led and it's still booting up!!!!
For info this is a MSI Socket 478 Mobo, P4 2.6, 250W PSU.
Hoep this is enough info for you guys.