Error Messages; Beep Symptoms; No-Beep Symptoms; Lcd-Related Symptoms - Lenovo ThinkPad X240 Hardware Maintenance Manual

Table 2. Numeric error codes (continued)
Symptom or error
2200
Machine Type and Serial Number are invalid.
2201
Machine UUID is invalid

Error messages

Table 3. Error messages
Symptom or error
Fan error.
Thermal sensing error.

Beep symptoms

Table 4. Beep symptoms
Symptom or error
Four cycles of four short beeps
One short beep, pause, three short beeps, pause, three
more short beeps, pause, and one short beep
Five short beeps
One long beep and two short beeps

No-beep symptoms

Table 5. No-beep symptoms
Symptom or error
No beep, system status indicator on, LCD blank, and no
POST.
No beep, system status indicator on, and LCD blank
during POST.
The power-on password prompt appears.
The hard-disk password prompt appears.

LCD-related symptoms

Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The
presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT
LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has
two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more
visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.
FRU or action, in sequence
Replace the system board.
Replace the system board.
FRU or action, in sequence
1. Replace the fan.
2. Apply thermal grease.
3. Replace the system board.
Replace the system board.
FRU or action, in sequence
Replace the system board.
1. Replace the memory module.
2. Replace the system board.
Replace the system board.
Replace the system board.
FRU or action, in sequence
1. Ensure that every connector is connected tightly
and correctly.
2. Reseat memory module.
3. Replace the system board.
1. Reseat memory module.
2. Replace the system board.
A power-on password or a supervisor password is set.
Type the password and press Enter.
A hard disk password is set. Type the password and
press Enter.
Chapter 4
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Related service information
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