I've got a stumper, I can't pinpoint whether it's a tcon, tab bond, or signal process issue. Temps cold/hot don't seem to affect it....sometimes it's just perfect as can be, most the time it looks like this:
This is an overscan crosshatch, where it appears ok....but it's still doing it.
I've cleaned the ribbon contacts till I'm blue in the face, no change. Poking/twisting/applying pressure to the signal processor/TCON board doesn't change anything...neither does it change anything with the tab bond PCB's. There's no rhyme or reason to the malfunction at all....as a matter of fact, as I typed this, it straightened itself right out and is pretty as a picture (pun intended).
PSU is putting out correct & stable voltages....I'm kinda baffled by this one....perhaps some of you more experienced TV guys might have some feedback. This belong to a customer, dropped off with the usual instructions of "I don't want to spend a whole lot" ...and I'm not a tech to feed parts until the issue goes away...but not being able to narrow this one down isn't helping. This is the first one I've not been able to isolate to either the panel (bad tab bonds) or the signal processor/TCON board (integrated onto one board with this model). If it's the panel, obviously the set is a goner.....I searched the panel number (LG LC470WUH), and no red flags came up of them being problematic....but I'd certainly like something more positive before I pronounce it.
The boards:
Any input would be super.
This is an overscan crosshatch, where it appears ok....but it's still doing it.
I've cleaned the ribbon contacts till I'm blue in the face, no change. Poking/twisting/applying pressure to the signal processor/TCON board doesn't change anything...neither does it change anything with the tab bond PCB's. There's no rhyme or reason to the malfunction at all....as a matter of fact, as I typed this, it straightened itself right out and is pretty as a picture (pun intended).
PSU is putting out correct & stable voltages....I'm kinda baffled by this one....perhaps some of you more experienced TV guys might have some feedback. This belong to a customer, dropped off with the usual instructions of "I don't want to spend a whole lot" ...and I'm not a tech to feed parts until the issue goes away...but not being able to narrow this one down isn't helping. This is the first one I've not been able to isolate to either the panel (bad tab bonds) or the signal processor/TCON board (integrated onto one board with this model). If it's the panel, obviously the set is a goner.....I searched the panel number (LG LC470WUH), and no red flags came up of them being problematic....but I'd certainly like something more positive before I pronounce it.
The boards:
Any input would be super.
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