Without the Right Tools It is Difficult To Fix Equipment
This BG 32″ LED TV with the model 32E38 came in for repair with the complaint of display screen problem-see the above picture. Screen problem usually caused by defective T-con board, bad LCD panel and the FPC cable either has loosen, spoilt or disconnected. Once the cover was removed I head straight to the T-con board to see any unusual problem on the components such as burnt parts, loosen cable and etc.
But all seems to be in good condition.
Now, I detached the right side FPC cable as shown in the photo below to isolate the problem.
There was no fault after I have detached the right side of the FPC cable It has proven the LCD panel was in good condition because I could see part of the picture clearly.
Next I removed the left side of the FPC cable while connected back the right side FPC cable, see the photo below:
There was no picture at the right side of the screen once the left FPC cable was removed. This has proven that the right side of the screen have problem.
Screen problem not necessarily must be the fault of a bad LCD panel, it can be caused by bad Tab bonding and the COF (chip on film).
If you look at the photo below, I do not know how to explain this when both the FPC cable were connected. But surely there is something not right at the screen panel circuitry.
When I opened up the bottom area I could see some burnt mark at the Tab bonding/COF area and I believe this is the main cause of the problem.
Conclusion- I gave up on this repair work because I do not have the TAB COF ACF LCD bonding machine. It is not cheap for this big machine.
Without this tool I can’t fix a new part in it. If you can fix this part successfully (100 %) without the TAB COF ACF bonding machine kindly share it in the comment section below. By the way you can take a look at the video below to see how new parts can be fixed :
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
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