Question about Westinghouse Televison & Video
Had sound no picture. replaced the backlight inverter board. Now picture flicks on for a moment, gets a little brighter & goes out. Picture flicks back on when turning off power. Sound the whole time & blue indicator light still on so has power. Checked Ohms to see if getting too much power on new board & reading 1.7. New board seems good. What else could it be?
After ignition of the back light, a control voltage will come from the main board, to control the intensity of the back light. This is true to all LCD TVs. You should check, whether this control voltage [a variable voltage according to picture displayed on the screen]. If it is not present, make sure that the main board is faulty, as this voltage is generated at the main board and send to the back light inverter board' to control the brightness. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience.
Posted on Apr 23, 2014
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Posted on Jan 02, 2017
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