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| Symptom/Error | FRU/Action |
|---|---|
| A no beep and a blank or unreadable | 1. System Board |
| display during POST. | 2. Voltage Converter |
| (See 'Power Systems Checkout' | 3. Communications Cartridge |
| before replacing any FRUs.) | 4. Hard Disk Drive |
| 5. Display Control Card | |
| 6. Any options | |
| 7. Power source when failing | |
| A no beep with a blinking cursor. | 1. System Board |
| 2. Display Control Card | |
| 3. Communications Cartridge | |
| A no beep with a normal | 1. Speaker |
| display during POST. | 2. Indicator Card |
| 3. System Board | |
| 4. Keyboard Control Card | |
| A no beep and the computer | 1. System Board |
| hangs after displaying memory count. | 2. Communications Cartridge |
| 3. Hard Disk Drive | |
| LCD too dark, unable to adjust | 1. LCD Panel |
| contrast or brightness. | 2. Regulator |
| (See | 3. Voltage Converter |
| 'CL57LCD FRU Replacement Notice' | |
| before replacing any FRUs.) | |
| LCD unreadable or illegible. | 1. LCD Panel |
| (See | 2. Display Control Card |
| 'CL57 LCD FRU Replacement Notice' | 3. LCD Cable |
| before replacing any FRUs.) | |
| Missing or discolored dots | 1. See 'CL57 LCD FRU Replacement Notice' |
| on the LCD panel. | |
| Unable to turn the LCD on and off. | 1. Regulator |
| 2. Voltage Converter | |
| 3. LCD Cable | |
| Blank screen, or extra horizontal | 1. LCD Panel |
| or vertical line(s) displayed on | 2. Display Control Card |
| upper or lower half of the LCD. | 3. LCD Cable |
| (See 'CL57 LCD FRU Replacement Notice' | |
| before replacing any FRUs.) | |
| Four battery indicators are blinking. | 1. Voltage Converter |
| Battery ID 1 | 2. System Board |
| Battery Status 1 | |
| Battery ID 2 | |
| Battery Status 2 | |
| System status indicator is | 1. Related Device |
| incorrectly blinking or stays on. | 2. System Board |
| 3. Indicator Card | |
| System status indicator stays off, | 1. Indicator Card |
| but the POST ends without an error | 2. System Board |
| 3. Related Device | |
| Reference Diskette does not work. | 1. Diskette Drive |
| (Try another Reference Diskette | 2. System Board |
| or any bootable diskette before | 3. Diskette Drive Cable |
| replacing FRUs. Ensure all | 4. Reference Diskette |
| correct level drivers are loaded.) | |
| Keyboard does not work. | 1. Keyboard Control Card |
| 2. Keyboard Cable | |
| 3. Numeric Keypad if used | |
| 4. System Board | |
| One or more keys do not work. | 1. Keyboard |
| (See | 2. Numeric Keypad |
| 'Ext. Keyboard/Aux. Input Device Checkout' | 3. Keyboard Control Card |
| before replacing any FRUs.) | |
| External display problems. | 1. External Display |
| (See | 2. Display Control Card |
| 'External Display Self-Test' | |
| before replacing any FRUs.) | |
| Incorrect memory size during POST. | 1. System Board |
| (See 'Memory Checkout' | 2. Memory Module |
| before replacing any FRUs.) | 3. IC DRAM Card |
| Computer hang or Intermittent hang. | 1. System Board |
| (See 'Undetermined Problem' | 2. Hard Disk Drive Cable |
| before replacing any FRUs.) | 3. Hard Disk Drive |
| 4. Replace the last device being tested | |
| 5. Display Control Card | |
| 6. Memory Module | |
| 7. IC DRAM Card | |
| 8. Voltage Converter | |
| The computer goes into suspend | 1. System Board |
| mode after the POST. | 2. Voltage Converter |
| 3. Lid Switch | |
| 4. Keyboard Control Card | |
| The computer does not suspend | 1. System Board |
| or resume. | 2. Voltage Converter |
| 3. Lid Switch | |
| 4. Keyboard Control Card | |
| The computer does not power off. | 1. Voltage Converter |
| 2. System Board | |
| 1. Indicator Card | |
| Real-time clock inaccurate. | 1. Backup Battery |
| (See 'Testing the Backup Battery' | 2. System Board |
| before replacing any FRUs.) | |
| Printer problems. | 1. See 'Printer Checkout' |
| Serial or parallel port device problems. | 1. Device |
| 2. Cable | |
| 3. System Board | |
| 4. Serial Adapter (if attached) | |
| 5. I/O Panel Assembly | |
| Internal Data/Fax modem does | 1. See 'Fax/Modem Checkout' |
| not communicate with a remote | |
| modem or a fax |
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.