Re: LG 70LB7100 no backlight after 2-5 min
Went ahead and replaced Main Board as it's main IC was running 140F-150F. Also backlights tested fine on this specific set. Since this set has no ventilation I installed a pc fan and drilled some holes for air intake and out. Main IC on new Main Board was running at around 125-130F which is around normal. Set has been back to customer for almost a month now with no issues. So to summarize this set's main board seems to overheat and turn the backlights off at least on the past two I've worked on.
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Re: LG 70LB7100 no backlight after 2-5 min
Just some info from a tv repair man. I've worked on this set once before issue was intermittent loss of backlights(had bad backlights) no surprise with tvs nowadays but after replacing all the backlights it still had the same issue. Almost never have a set with backlight issues that weren't in the strips or the power supply. Replaced the power supply as well same issues. Customer was getting impatient by now so we called it quits. So I ended up selling the circuit boards on Ebay. After selling the Main board got a message from the buyer...
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
The part number(Partial)you have to go by on the P502UI-B1E Serial#LTY6RKBQ is XECB0TK0040 on the Main board. Here's the manufacturer link:
[url]https://encompass.com/item/10730980/Vizparts/TXECB0TK004030/[/url]Re: Vizio P502UI-B1E has no backligh....com/item/1073
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
I'm a tv technician for a consumer electronic company and had a customer bring in this model with similar issues (No backlight/No picture). New Main board fixed it. Only place I could find it for a reasonable price was ebay. From manufacturer it was around $350 if I remember right.
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