IBM RT PC 10 Hardware Maintenance And Service page 121

Step 9
1.
Set the system unit power switch to Off.
2. Disconnect the keyboard and mouse cables.
3. Disconnect all of the external device cables.
4. Be sure the power has been off 30 seconds, then set the power switch
on the system unit to On.
5. Wait 15 seconds, then answer the following question.
bJD
3- 76 Service Manual
IS THE POWER-ON INDICATOR ON?
YES One of the external devices is defective. Do the following:
1. Set the power switch on the system unit to Off.
2. Connect the cable to an external device.
3. Set the power switch on the system unit to On.
4. If the Power-On indicator is on, repeat these Steps. If the
Power-On indicator is off, exchange or repair the last device
connected. This completes the repair.
NO Continue on the next page.