Memory | 1. | If two DIMMs are installed, remove one |
| ||
|
| of them and run Diagnostics |
|
| Memory Test - Quick. |
| 2. | If the problem does not recur, replace |
|
| the DIMM, remove the other one, and |
|
| run the test again. |
| 3. | If the test does not detect the error, run |
|
| Diagnostics |
|
|
|
Fan | 1. | Turn on the computer and check the air |
| ||
|
| turbulence at the louver near the power |
|
| switch. |
| 2. | Run Diagnostics |
|
| IBM Fan. |
|
|
|
Fn key combinations
The following table shows the function of each combination of Fn with a function key.
The Fn key works independently from the operating system.
Key Combination | Result |
|
|
Fn + F1 | Reserved. |
|
|
Fn + F2 | Reserved. |
|
|
Fn + F3 | Standby mode. |
|
|
Fn + F4 | Suspend mode. |
|
|
Fn + F5 | Reserved. |
|
|
Fn + F6 | Reserved. |
|
|
Fn + F7 | Switch between the LCD, the external |
| monitor, and both the LCD and external |
| monitor. |
|
|
Fn + F8 | Reserved. |
|
|
Fn + F9 | Reserved. |
|
|
Fn + F12 | Hibernation mode. |
|
|
Fn + PgUp | ThinkLight On/Off. |
|
|
Fn + Home | The LCD becomes brighter. |
|
|
Fn + End | The LCD becomes less bright. |
|
|
Chapter 3. ThinkPad X20, X21, X22, X23, X24 47
