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LCD related symptoms - ThinkPad General

Other error messages, codes, or symptoms
Numeric error codes
Beep and no beep symptoms
Intermittent and undetermined problems
Error messages

If you are unable to find your particular symptom or error, please refer to Need more help?

Affected configurations
This document applies to the following ThinkPad systems:
  • A20m, A20p, A21e, A21m, A21p, A22e, A22,. A22p, A30, A30p, A31, A31p
  • G40, G41
  • R40, R40e, R50, R50e, R50p, R51, R51e, R52
  • R60, R60e, R61
  • T20, T21, T22, T23, T30, T40, T41, T41p, T42, T42p, T43, T43p, T60, T60p, T61
  • X20, X21, X22, X23, X24, X30, X31, X32, X40, X41, X41 Tablet, X60, X60s, X61, X61s, X61 Tablet
  • X300
  • Z60m, Z60t
  • Z61e, Z61m, Z61t
  • TransNote
  • i Series 1600, 1800

Note: The LCD for notebook computers contains many thin-film transistors (TFTs). The presence of a small number of dots that are missing, discolored, or always lit are characteristics of TFT LCD technology, but excessive pixel problems can cause viewing concerns. Click here for information on when the LCD should be replaced for excessive pixel issues.

Symptom or Error

FRU or Action, in sequence

  • No beep, power-on, indicator on, and a blank LCD during POST
  1. System board
  • LCD backlight not working
  • LCD too dark
  • LCD brightness cannot be adjusted
  • LCD contrast cannot be adjusted
  1. Lid switch on the keyboard bezel
  2. Reseat the LCD connectors
  3. LCD assembly
  4. System board
  • LCD screen unreadable
  • Characters missing pixels
  • Screen abnormal
  • Wrong color displayed
  1. See Note above
  2. Reseat all LCD connectors
  3. LCD assembly
  4. System board
  • LCD screen has extra horizontal or vertical lines displayed
  1. LCD Assembly
  • LCD screen stays on even after you turn off your computer
  1. Press and hold the power switch for 4 seconds or longer to turn off your computer
  2. Then turn it on again

Need more help?
Please select one of the the following options for further assistance:

Customer Replaceable Unit (CRU) parts installation and removal movies
How to access the BIOS - ThinkPad General
Service parts list index
Troubleshooting
Submit a technical question
Contact your local technical Support Center


  • Alias ID: MIGR-45707
  • Document ID: HT035389
  • Last Updated :2014-06-17
  • (c) 2014 Lenovo