NOTHING TURNS ON WHEN I PLUG THE 4 PIN CONNECTOR 12 VOLT POWER SUPPLIER TO THE MOTHEBOARD. WHEN I DISCONNECT THIS 4 PIN CONNECTOR FROM THE MOTHERBOARD THEN EVERYTHING TURNS ON EXCEPT NOTHING SHOWS UP ON MY DISPLAY MONTOR. NEED TO HAVE THE 4 PIN CONNECTOR PLUGGED IN IN ORDER FOR MY DISPLAY MONITOR TO SHOW ANYTHING. THIS IS A ABIT ib9 MOTHERBOARD WITH A 500 WATT THERMALTAKE POWER SUPPLY. CAN YOU HELP ME OUT WITH THIS PROBLEM., PLEASE
In this case it is normally a voltage regulator near the cpu that is shorted and will need to be replaced.
Remove everything from the board, except the heat sink fan and plug in the big power connector, do not connect the 4 pin connector. Turn the power on as you were before.
Using a multimeter, check the voltages on those regulators. You should find them running in pairs normally, but make sure to check all of them and try to pick the odd one out.
Put your black lead to ground, and use some electrical tape to cover all of the red leads probe except for 2mm at the tip to help prevent shorting out anything else while you are there.
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