Bought this tv for a fixer upper. The tv and backlights turn on but nothing is displayed on the screen. This model does not have a separate tcon board. It has a ribbon cable which goes from the main board to the buffer board attached to the bottom of the panel. Since the power supply tests good, it's gotta be the main board right? I tried three different main boards with no change. I do get voltage at some test points on the buffer board but I'm at a loss of what to do next. Any help would be appreciated.
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55" Element tv turns on, no picture E4SJ5517BF
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Re: 55" Element tv turns on, no picture
You are correct board swapping is not an option. Your only choice is board level troubleshooting and replacement of component. So checking voltages is first step. 12v input, hvadd, vcc, avdd etc. Your second most important picture is to blurry to read.I assume no responsibility for any stupid suggestions I might post.
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Re: 55" Element tv turns on, no picture
The group of 4 circled capacitors(pic) measured .45v, but when switching the test leads, they measured 0v. The single circled capacitor(pic) measured 0v, with test leads both ways. The rest of the caps ranged from .1v - 1.8v. All were tested in diode mode.
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Re: 55" Element tv turns on, no picture
Those 2 chips don't have the same numbers, do they? You are missing voltages from your dc to dc chip. Not sure which one it is. Not finding any info on the rt6939. I would think one would be gamma chip, but don't see any gamma points.I assume no responsibility for any stupid suggestions I might post.
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Re: 55" Element tv turns on, no picture
Closest I could find is this chip schematic, which looks similar to yours. I would look for HVIN12v around the chip. Check for shorts on points with no voltage. If you have voltage going to ic and no shorts I would replace RT6939
I assume no responsibility for any stupid suggestions I might post.
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