Power supply troubleshooting - or as the techies / geeks say: PSU
To use the check list you read the problem, then run down the list until you
fix the problem. This is called a fall through check list.
There are two types of power problems.
No power at outlet or no power at mother board.
You go to power up your system and you get nothing.
Probable causes are:
Power cord disconnected
No power at wall outlet or power strip off, may have a blown fuse or it has failed.
Power supply has failed.
PSU troubleshooting Steps:
Check power cord pulled loose from computer or electrical socket.
No power at wall outlet, check socket with another electrical device.
Power strip off? or has the built in circuit breaker popped?
(If the power strip circuit breaker is not the problem don't mess with the strip, purchase a
throw the old one away, cut the power strip power cord off, then someone else can't
Note: I say power strip here but what you should have is what is called a
"surge suppressor" See this page for more information on
Still no power?
PS troubleshooting Observe ESD!
The following check requires you to open your
Trace down the power connection from the power supply to the mother board. Check
the connection to the mother board, disconnect it then reconnect it. Check the other power
connectors to the hard drive and CD ROM.
Power Supply has failed.
troubleshooting techniques and checklists to assist you in your repairs see the
Self Computer Repair Unleashed! 2nd Edition
Self Computer Repair Unleashed! 2nd Edition E-Book..
Do NOT open the power supply! It has no user salvageable parts! Only a QUALIFIED
electrician should do work on a power supply. A "dead" or non operational power
supply has the potential of having electoral energy stored in the capacitors,
that energy is enough to seriously harm or kill you.