[ 1. The power supply's fan is not turning.
  2. The +/- 12 Volt lines on the motherboard are not on their own the cause of the fan not turning (but could be a second problem - multiple shorted caps).
  3. IBM 5155 with IBM 114 watt power supply. ]



Your computer is an IBM 5155 (IBM Portable PC), with genuine IBM 114 watt power supply.



What Now?


Unfortunately, the IBM 114 watt power supply in the IBM 5155 is difficult to adequately load.
So, what we will do now is some resistance checks.

Click here.