Table of Contents
Advertisement
+---+
¦011¦
+---+
- Run advanced diagnostics for all devices using the AC adapter.
'RUN TEST ONE TIME' option.
DID ALL THE TESTS END WITHOUT AN ERROR?
Yes
No
¦
¦
¦
+---+
¦
¦012¦
¦
+---+
¦
Follow the instructions on the screen.
¦
If the instructions do not appear or do not correct the problem,
¦
replace the system board.
¦
¦
+---+
¦013¦
+---+
Go to "Checking the Battery Pack" in topic 5.3.
If "Checking the Battery Pack" does not correct the problem, go to
"Checking the Voltage Converter" in topic 5.7.
--------------------------------------------------------------------------
+---+
¦014¦
+---+
- Unplug the AC adapter if used.
- Remove the bottom cover and disconnect the flat cable from connector CN6
on the voltage converter.
- Check that the resistance at connector CN5 is greater than 5 ohms
between pins 7 and 1, and also between 7 and 3.
IS THE RESISTANCE CORRECT?
Yes
No
¦
¦
¦
+---+
¦
¦015¦
¦
+---+
¦
Go to Step 017.
¦
+---+
¦016¦
+---+
Go to "Checking the Voltage Converter" in topic 5.7.
If"Checking the Voltage Converter" does not correct the problem, go to
Step 017.
--------------------------------------------------------------------------
+---+
¦017¦
+---+
- Remove the following if installed:
Battery pack
Standby battery
Backup battery
Memory module kit
Internal Data/Fax modem
Serial adapter
Numeric keypad
Mouse
External display
Hard disk drive
Diskette drive
LCD inverter cable
LCD panel cable.
- Make sure the voltage converter is correctly installed.
- Plug in the AC adapter and power-on the system.
DID YOU HEAR ONE LONG OR TWO SHORT BEEPS?
Yes
No
¦
¦
¦
+---+
¦
¦018¦
¦
+---+
¦
¦
Replace the following FRUs one at a time until the problem is
¦
corrected.
¦
Voltage converter
¦
I/O panel assembly
¦
System board.
¦
+---+
¦019¦
+---+
IBM PS/2 Model N51 SX HMS
Power Supply
(See page 5.7 for the connector location.)
¦ Copyright IBM Corp. 1991
5.0 - 2
Use the
Advertisement
Table of Contents
