Keyboard (6565/6868/6878)
Note:
If a mouse or other pointing device is attached,
remove it to see if the error symptom goes away. If
the symptom goes away, the mouse or pointing device
is defective.
+---+
|001|
+---+
- Power-off the computer.
- Disconnect the keyboard cable from the system unit.
- Power-on the computer and check the keyboard cable connector on
the system unit for the voltages shown. All voltages are ñ 5%.
+-----+--------------+
| Pin | Voltage (Vdc)|
+-----+--------------+
| 1 | +5.0 |
| 2 | Not Used |
| 3 | Ground |
| 4 | +5.0 |
| 5 | +5.0 |
| 6 | Not Used |
+-----+--------------+
ARE THE VOLTAGES CORRECT?
+---+
Yes No |002| Replace the system board.
| +---+
|
+---+
|003| On keyboards with a detachable cable, replace the cable.
+---+ If the problem remains or if the cable is permanently
attached to the keyboard, replace the keyboard. If the
problem remains, replace the system board.
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.