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Pete
Pete, Electronic Engineer
Category: TV
Satisfied Customers: 15743
Experience:  Over 16 years of experience installing and repairing electronics.
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I just replaced the upper y buffer and y sus on an LG

Customer Question

I just replaced the upper y buffer and y sus on an LG plasma. It was working and then all of a sudden there was a vertical line flash and the screen went dark. The sound still works though.
Submitted: 6 months ago.
Category: TV
Expert:  Pete replied 6 months ago.

Hi there,

Did you replace the boards before or after there was a vertical line flash and the screen went dark?

Customer: replied 6 months ago.
I replaced the two boards because the screen flashed and went dark last week. The screen was working for approx 2-3 min and then I switched to another input and the vertical line flash came and then the screen went dark (there was sound still though)
Expert:  Pete replied 6 months ago.

Ok, this does sound more like a problem with the main board if you have sound but no picture.

Can you try fitting a replacement main board?

Customer: replied 6 months ago.
The main power panel or y or z sus panels?
Expert:  Pete replied 6 months ago.
The main processor board.
Customer: replied 6 months ago.
Can you point out which is the main processor board? Bottom right is labeled ACCLLHR board, the middle big board I understand is the power board and the small board just below and right is labeled the CTRL board.
Expert:  Pete replied 6 months ago.

The main processor board is in the lower right corner of your photo, labelled ACCLLHR.

Expert:  Pete replied 6 months ago.

This board processes the input signals and outputs them to the display.