Note: The most likely cause is listed first, in boldface type.
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One beep and a blank, unreadable, or flashing LCD
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- Reseat the LCD connector
- LCD assembly
- External CRT
- System board.
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One long and two short beeps, and a blank or unreadable LCD
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- System board
- LCD assembly
- DIMM.
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Two short beeps with error codes POST error.
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Two short beeps with blank screen
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| Two or more beeps, or a continuous beep. Operating System starts successfully. |
If a Mini PCI Ethernet card is installed, confirm that Alert On LAN 2 in BIOS Setup Utility is disabled. |
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Three short beeps, pause, three more short beeps, and one short beep.
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| One short beep, pause, three short beeps, pause, three more short beeps, and one short beep. |
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Only cursor appears
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Reinstall operating system.
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No beep, power-on indicator on, LCD blank, and no POST
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- Make sure that every connector is connected tightly and correctly
- DIMM.
- System board.
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No beep, power-on indicator on, and LCD blank during POST
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- Reseat DIMM.
- System board.
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No beep during POST, but system runs correctly
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Speaker.
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The power-on password prompt
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A power-on password or a supervisor password is set. Type the password and press Enter.
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The hard-disk password prompt
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A hard-disk password is set. Type the password and press Enter.
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The DOS full screen looks smaller.
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Start the ThinkPad Configuration program and set the Screen expansion function.
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