IBM PS/2 N51 SX Hardware Maintenance Service page 33

10.3 Miscellaneous Symptoms
+------------------------------------------------------------------------+
¦ Symptom/Error
+------------------------------------+-----------------------------------¦
¦ LCD too dark, unable to adjust
¦ contrast or brightness.
¦
+------------------------------------+-----------------------------------¦
¦ LCD unreadable or distorted.
¦
¦
¦
+------------------------------------+-----------------------------------¦
¦ LCD cannot be turned on or off.
¦
¦
+------------------------------------+-----------------------------------¦
¦ Blank screen, or extra horizontal
¦ or vertical line(s) displayed on
¦ upper or lower half of the LCD.
+------------------------------------+-----------------------------------¦
¦ System status indicator is
¦ incorrectly blinking or stays on.
+------------------------------------+-----------------------------------¦
¦ System status indicator stays off, ¦ I/O Panel Assembly
¦ but the POST ends without an
¦ error.
+------------------------------------+-----------------------------------¦
¦ Keyboard does not work.
¦
¦
+------------------------------------+-----------------------------------¦
¦ One or more keys do not work.
¦ (See "Keyboard" in topic 6.0
¦ before replacing any FRUs.)
+------------------------------------+-----------------------------------¦
¦ External display problems.
¦ (See "External Display Self-Test"
¦ in topic 8.0 before replacing any
¦ FRUs.)
+------------------------------------+-----------------------------------¦
¦ Incorrect memory size during POST. ¦ System Board
¦ (See "Memory" in topic 9.0 before
¦ replacing any FRUs.)
+------------------------------------+-----------------------------------¦
¦ System hang-up or Intermittent
¦ hang-up.
¦ (See "Undetermined Problem" in
¦ topic 3.0 before replacing any
¦ FRUs.)
¦
+------------------------------------+-----------------------------------¦
¦ The system goes into suspend mode
¦ after the POST.
¦
¦
+------------------------------------+-----------------------------------¦
¦ The system does not suspend or
¦ resume.
¦
¦
+------------------------------------+-----------------------------------¦
¦ The system does not power off.
¦
¦
+------------------------------------+-----------------------------------¦
¦ Real-time clock inaccurate.
¦ (See "Checking the Backup Battery" ¦ System Board
¦ in topic 5.4 before replacing any
¦ FRUs.)
+------------------------------------+-----------------------------------¦
¦ Printer problems.
+------------------------------------+-----------------------------------¦
¦ Serial or parallel port device
¦ problems.
¦
¦
¦
+------------------------------------+-----------------------------------¦
¦ Internal Data/Fax modem does not
¦ communicate with a remote modem or ¦ Hardware Maintenance Service
¦ a fax.
+------------------------------------------------------------------------+
IBM PS/2 Model N51 SX HMS
Miscellaneous Symptoms
¦ FRU/Action
¦ LCD Inverter
¦ LCD Panel
¦ System Board
¦ LCD Panel
¦ System board
¦ LCD Inverter
¦ LCD Cable
¦ LCD Inverter
¦ System Board
¦ LCD Cable
¦ LCD Panel
¦ System Board
¦ LCD Cable
¦ System Board
¦ Related Device
¦ System Board
¦ Related Device
¦ Keyboard-control card
¦ Numeric Keypad if used
¦ System Board
¦ Keyboard
¦ Numeric Keypad if installed
¦ Keyboard Control Card
¦ External Display
¦ System Board
¦ I/O Panel Assembly
¦
¦ Memory Module Kit
¦
¦ System Board
¦ Hard Disk Drive Cable
¦ Hard Disk Drive
¦ Replace the last device
¦ being tested
¦ Voltage Converter
¦ System Board
¦ Voltage Converter
¦ Lid Switch
¦ Keyboard Control Card
¦ System Board
¦ Voltage Converter
¦ Lid Switch
¦ Keyboard Control Card
¦ Voltage Converter
¦ System Board
¦ I/O Panel Assembly
¦ Backup Battery
¦
¦
¦ See "Printer" in topic 7.0.
¦ Device
¦ Cable
¦ System Board
¦ Serial Adapter (if attached)
¦ I/O Panel Assembly
¦ See the Internal Data/Fax Modem
¦ supplement.
¦ Copyright IBM Corp. 1991
10.3 - 1
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