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Crumbtrail TV Forums: TV Equipment: LCD TV Forum:
RCA L40FHD41VX9

 

 


taftdavid
New User

Nov 20, 2010, 12:30 PM

Post #1 of 2 (1391 views)
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RCA L40FHD41VX9 Can't Post

The tv has good video for about 60 seconds when you turn it on. Then there is a line right down the center, with a black bar 1/2 inch wide from top to bottom on the left side. That black bar is there even with a blue screen. Please help!
Dave
ABC TV & Computer Repair
Taft David Haynes
ABC TV & Computer Repair
1106 Valley View Circle
Bloomington, IL 61705



Repair man
Enthusiast


Nov 24, 2010, 4:12 AM

Post #2 of 2 (1380 views)
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Re: [taftdavid] RCA L40FHD41VX9 [In reply to] Can't Post

Hello Dave -- Check for a loose connection on the LVD cable (Low Voltage Differential cable) that leads from the Signal board (the board with the tuner and input jacks) up to the TCON board (the board mounted at the top center of LCD panel; sometimes behind a metal shield).

This LVD cable will sometimes either work it's way loose slightly or it can become slightly tarnished, like any metal, and can cause various intermittent video problems. If you remove it from it's socket and then re-seat it this will clear up many video problems. There are usually two clips the need to be pulled inward to release this plug.

There is also a ribbon cable (flex cable) that leads from the top end of the TCON board to the LCD panel. It's bonded at the end where it connects to the LCD panel so you can't do anything there but where it connects to the TCON board you could remove it and re-seat it as well. This flex cable is usually held in place by a 90 degree clip. To remove it there is a brown clip the needs to be pulled in a back and downward motion to a 90 degree angle (pull by outer edges) then the flex cable can be removed. When replacing the flex cable be sure to insert it the same distance as it was originally. Before you remove it you may want to mark the distance it's inserted with a sharpie marker.

If either of the above procedures do not repair your problem then you could have a bad TCON board or a bad LCD panel. Most of the time with the LCD panel the flex cable becomes detached from the panel which is non repairable (it's factory bonded).

Dan

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