LC-42SD1E (serv.man4). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 25

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4 – 25
 
LCD failure
Does a single or several vertical 
stripes appear on the LCD screen?
Replace the LCD panel.
Does a single or several horizontal
stripes appear on the LCD screen?
Do luminescent or black dots appear 
on the screen?
Is the on-screen image rippling or
distorted?
LCD failure
The backlight functions.
Does not the image come out in the 
LCD screen (screen black)?
Replace the LCD control unit
Does the entire LCD screen look 
whitish all over?
Does the QS drive function?
Are there data bit drop-outs?
(No solution even when turning on 
and off the QS drive)
Is the gamma correction as 
specified?

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