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Symptom/Error
Mouse and Pointing Stick
problems.
Cursor floats or moves
erratically.
External display problems.
Incorrect memory size
during POST.
System hang or Intermittent
hang.
The system goes into
suspend mode after the
POST.
The system does not
suspend or resume.
The computer does not
power-off.
ThinkPad 700, 700C, 720, 720C (9552)
FRU/Action
1. See "1080 Keyboard
Unit" on page 54
before replacing any
FRUs.
2. Disable Trackpoint and
test Mouse again. The
Trackpoint can
interfere with the
operation of some
Mouse devices.
3. Mouse
4. Keyboard Control Card
5. Keyboard
1. See "TrackPoint II
Checkout" on
page 476 before
replacing any FRUs.
2. Mouse
3. Keyboard
1. See "External Display
Self-Test" on
page 470 before
replacing any FRUs.
2. External Display
3. Video Card
4. System Board
1. See "Memory
Checkout" on
page 70 before
replacing any FRUs.
2. Base Memory Card
3. IC DRAM Card
1. See "Undetermined
Problem" on page 93
before replacing any
FRUs.
2. System Board
3. Hard Disk Drive
4. Replace the last device
being tested
5. Voltage Converter
1. System Board
2. Voltage Converter
3. Keyboard Control Card
1. Check the
Suspend/Resume
switch operation. If
broken, replace the
Voltage Converter.
2. System Board
3. Voltage Converter
4. Keyboard Control Card
5. Keyboard
1. Voltage Converter
2. System Board
91
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