No | Beep | Symptoms |
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Symptom/Error |
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| FRU/Action | in | Sequence |
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No beep, |
| Ÿ Ensure every connector is | |||||||||||||
indicator |
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blank, | no | POST |
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| Ÿ | DIMM |
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No | beep, |
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indicator |
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blank |
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No | beep, |
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indicator |
| on, | LCD |
| Ÿ | System board |
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blank |
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No | beep | during |
| Speaker |
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POST | but | system |
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runs | correctly. |
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Symptom/Error |
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| FRU/Action | in | Sequence |
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LCD |
| backlight | not | 1. | Reseat | the | LCD | connector. | |||||||
working |
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| 2. | LCD | FPC | ASM |
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LCD |
| too dark |
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LCD |
| brightness | 4. | LCD |
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cannot | be | adjusted |
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5. | System board |
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LCD |
| contrast | cannot |
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be | adjusted |
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LCD |
| screen | unread- | 1. | Reseat | the | LCD | connector. | |||||||
able |
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| 2. | LCD | FPC | ASM |
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Character |
| missing | 3. | LCD inverter |
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pels |
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| 4. | LCD |
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Screen | abnormal |
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5. | System board |
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Wrong color dis- played
LCD has extra hori- 1. LCD FPC ASM
zontal or vertical lines
2. LCD inverter
displayed.
3.LCD
4.System board
Keyboard-Related Symptoms
Symptom/Error |
| FRU/Action in Sequence |
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Keyboard | (one or | 1. | Reseat the keyboard | cable. |
more keys) | doesn't | 2. | Keyboard |
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work. |
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| 3. | System board |
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Indicator-Related Symptoms
ThinkPad 24019