
| Symptom or error | FRU or action, | in | 
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| 
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 | sequence | 
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| In | OS/2, | DOS, or | Windows,Check | that | the | modem | is | 
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| the | modem | does | not work.active. | 
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| 
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 | OS/2 | and | Windows: | 
 | 
 | |
| 
 | 
 | 
 | Click | on | theModem | icon in | 
 | |
| 
 | 
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 | the | ThinkPad | Configuration | 
 | ||
| 
 | 
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 | program. | 
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 | ||
| 
 | 
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 | DOS: | 
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| 
 | 
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 | Run | the MWMODEM | ON | 
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 | |
| 
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 | command. | 
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| 
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PC Card-related  symptoms
| Symptom | or | error | 
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 | FRU or | action, | in | 
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 | sequence | 
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| PC | Card | does | not | work | in | 1. Reseat | the | PCMCIA | 
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| either the upper slot | or theslot | assembly . | 
 | ||||||||
| lower | slot. | 
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 | 2. | PCMCIA slot | 
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 | assembly. | 
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| 
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 | 3. | System board. | 
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| PCMCIA | slot pin | is | 
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 | PCMCIA | slot | assembly | 
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| damaged. | 
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| 
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| PC | Card | does | not | work. | 
 | 1. Reseat | the | PC Card . | 
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| 
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 | 
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 | 2. Check that the PC | 
 | |||
| 
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 | 
 | 
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 | Card is enabled in | the | |||
| 
 | 
 | 
 | 
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 | 
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 | ThinkPad | Configuration | 
 | ||
| 
 | 
 | 
 | 
 | 
 | 
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 | program. | 
 | 
 | ||
| 
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 | 
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 | 
 | 
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 | 3. | Reseat | the PCMCIA | 
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| 
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 | slot | assembly. | 
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| 
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 | 4. | PCMCIA slot | 
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| 
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 | assembly. | 
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| 
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 | 5. | System board. | 
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| 
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Peripheral-device-related  symptoms
| Symptom or | error | FRU | or | 
 | action, | in | 
 | 
 | ||
| 
 | 
 | 
 | sequence | 
 | 
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 | |
| 
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| The | external monitor | doesConnect | 
 | the | external | 
 | ||||
| not | work | correctly. | monitor | 
 | to | another | PC. If | 
 | ||
| 
 | 
 | 
 | the | monitor | works | 
 | 
 | |||
| 
 | 
 | 
 | properly, | replace | the | 
 | 
 | |||
| 
 | 
 | 
 | system | 
 | board. | If | not, | 
 | ||
| 
 | 
 | 
 | replace | the | external | 
 | 
 | |||
| 
 | 
 | 
 | monitor . | 
 | 
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 | |||
| 
 | 
 | 
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 | ||||||
| Printer | problems. | 1. Run | printer  | 
 | ||||||
| 
 | 
 | 
 | 2. | Run parallel port | wrap | |||||
| 
 | 
 | 
 | 
 | test. | 
 | 
 | 
 | |||
| 
 | 
 | 
 | 
 | 3. | 
 | System board. | 
 | |||
| 
 | 
 | 
 | 
 | 4. | 
 | Printer cable. | 
 | |||
| 
 | 
 | 
 | 
 | |||||||
| Serial or parallel port device1.Run serial/parallel | 
 | 
 | ||||||||
| problems. | 
 | port | wrap | test. | 
 | |||||
| 
 | 
 | 
 | 
 | 2. | 
 | Device. | 
 | 
 | ||
| 
 | 
 | 
 | 
 | 3. | 
 | System board. | 
 | |||
| 
 | 
 | 
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 | 4. | 
 | Device cable. | 
 | |||
| 
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30 ThinkPad 600X Hardware Maintenance Manual
