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3 Vertical lines that appear and disappear on Samsung LN46C650
I'm helping a friend with a 15 yr old Samsung, nice TV (LN46C650) that looks clean and crisp, but when it's been running 30-60 minutes or more will show vertical lines that come and go. Sometimes the lines stay there permanently until the TV is turned off & back on. That might work for an hour, or lines might return quickly.
I removed the back panel, inspected for any visibly bad caps - not seeing anything.
Next I removed and reseated all ribbons and connected wiring to the boards. For a week or 2, didn't see any vertical lines, but now they're back.
T-con board?
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@winstontoby those lines are most unlikely caused by the T-con board. This looks more like bad LVDS cables or connectors. This "when it's been running 30-60 minutes" sounds like something gets hot and fails. get some freeze spray and spray some areas of the main board as well as the T-con board ribbon cable connector areas when the lines appear. See if cooling components down restores the image.
из oldturkey03
Good comments. Just to be clear, you're suggesting it's probably NOT the T-con board, right?
Heat seemed likely to me too, but a bit surprising, since this TV really feels very cool compared to others I've worked on. But last night I pulled the back off and let it run for quite awhile, thinking that might help if something is overheating - no lines. However, it sometimes will go for days with no symptoms, so I'll be patient.
So . . . I'll work with your suggestions - it may be awhile before I respond with "success" or "no success".
из Kenton Cleveland