Link to home
Start Free TrialLog in
Avatar of ndallari
ndallari

asked on

Can a motherboard fry a power supply?

I opened a Desktop computer because when I tried turn it on it was completely dead. No LED's or fans.
I tested the power supply and the tester only showed +5 volts was working.
I swapped the power supply with one that I know works and the motherboard fan and Power LED went on for a brief moment but still would not boot.
I checkec that power supply with the tester and again it only show +5 volts.
So I pulled out a third and very good power supply plugged it in and same results.
My new and very good CoolerMaster power supply ended up the same with only +5 volts working.
I am besides myself.
Can a motherboard fry a power supply?
SOLUTION
Avatar of PUNKY
PUNKY
Flag of United States of America image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
ASKER CERTIFIED SOLUTION
Avatar of nobus
nobus
Flag of Belgium image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of ndallari
ndallari

ASKER

The power supplies did start working again by themselves.
I guess they reset themselves after a while.
One of the power supplies did not return full functionality.
It is still missing channel -5 volts.
Is their any way to recover it?

I was also wondering if their is any use for all the dead power supplies I have hanging around. Can they refrubished by someone?
>>  The power supplies did start working again by themselves.
I guess they reset themselves after a while.    <<   as i supposed; many power supplies have voltage and current protection, and if overloaded ( even by a short) go into protect mode, which takes some time to get out of it
>>  One of the power supplies did not return full functionality.
It is still missing channel -5 volts.   <<   that is a bad one; you can try to repair it yourself, but sending it to a Cy will cost more for repair than a new one.