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LCD related symptoms - ThinkPad General

Discussion in 'Casie Studies' started by Administrator, Jun 13, 2018.

  1. Administrator

    Administrator Administrator Staff Member

    Apr 6, 2017
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    LCD related symptoms - ThinkPad General

    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

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