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| Symptom/Error | FRU/Action |
|---|---|
| No beep and a blank or unreadable | 1. System Board |
| display during POST. | 2. Any option or device |
| (See 'Power Systems Checkout' | 3. Power source when failing |
| before replacing any FRUs.) | 4. Voltage Converter |
| 5. Speaker | |
| No beep with a blinking cursor. | 1. System Board |
| 2. Communications Cartridge | |
| No beep with a normal display during POST. | 1. Speaker |
| 2. I/O Panel Assembly | |
| 3. System Board | |
| 4. Keyboard Control Card | |
| No beep and the computer hangs after | 1. System Board |
| displaying memory count. | 2. Communications Cartridge |
| 3. Hard Disk Drive | |
| LCD too dark, unable to adjust | 1. LCD Inverter |
| contrast or brightness. | 2. LCD Panel |
| 3. System Board | |
| LCD unreadable or distorted. | 1. LCD Panel |
| (If an external display is OK, | 2. System board |
| replace system board last.) | 3. LCD Inverter |
| 4. LCD Cable | |
| LCD cannot be turned on or off. | 1. LCD Inverter |
| 2. System Board | |
| 3. LCD Cable | |
| Blank screen, or extra horizontal | 1. LCD Panel |
| or vertical line(s) displayed on | 2. System Board |
| upper or lower half of the LCD. | 3. LCD Cable |
| Computer status indicator is | 1. System Board |
| incorrectly blinking or stays on. | 2. Related Device |
| Computer status indicator | 1. I/O Panel Assembly |
| stays off, but the POST ends | 2. System Board |
| without an error | 3. Related Device |
| Suspend light comes on after | 1. Reseat voltage regulator cables |
| POST, an error. | 2. Voltage Regulator |
| 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 correct | 4. Reference Diskette |
| level drivers are loaded.) | |
| Keyboard does not work. | 1. Keyboard Control Card |
| 2. Numeric Keypad | |
| 3. System Board | |
| One or more keys do not work. | 1. Keyboard |
| (See | 2. Numeric Keypad if installed |
| 'Ext. Keyboard/Aux. Input Device Checkout' | 3. Keyboard Control Card |
| before replacing any FRUs.) | |
| External display problems. | 1. External Display |
| (See 'External Display Self-Test' | 2. System Board |
| before replacing any FRUs.) | 3. I/O Panel Assembly |
| Incorrect memory size during POST. | 1. System Board |
| (See 'Memory Checkout' | 2. Memory Module Kit |
| before replacing any FRUs.) | |
| 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. Voltage Converter | |
| The computer goes into | 1. System Board |
| suspend mode after the POST. | 2. Voltage Converter |
| 3. Lid Switch | |
| 4. Keyboard Control Card | |
| The computer does not suspend or resume. | 1. System Board |
| 2. Voltage Converter | |
| 3. Lid Switch | |
| 4. Keyboard Control Card | |
| The computer does not power off. | 1. Voltage Converter |
| 2. System Board | |
| 3. I/O Panel Assembly | |
| Real-time clock inaccurate. | 1. Backup Battery |
| (See 'Testing the Battery Pack' | 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 | |
| 5. I/O Panel Assembly | |
| Internal Data/Fax modem does not | 1. See 'Fax/Modem Checkout' |
| 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.