Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
1 month for 1st attempt @ 400F / 12 min
28 months for 2nd attempt @ 400F / 15 min
---still working after the 3rd attempt @ 400F / 18 min from a day ago....
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
Third reflow in 2.5 years. This time was 400F/202C for 18 min and it's working again.
@diif - true, a proper reflow should take way less but we're not talking about "proper" here.
Next time I might have to get the hot air station from the box and actually use it. Let's see how long will 3rd one last. Hopefully it's a charm.
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
2 years 4 months later and I'm back to square 1: no image at all, just the light for the power goes on and off when pressing the power button.
Garbage in, garbage out. Vizio.
Next baking session will be more than 15 min or even the hot air station.
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
Well...looks, like any miracle, it didn't last for too long. Slightly more than a month. Last night I baked the board again and it's working fine again. This time for 15 min and slightly lower in the oven.
Will see how much will last this time....
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
IT WORKED!!! THANK YOU ALL !!!
I cooked the Mainboard for 12 min @ 400 F and let it cool until next day (I actually forgot about it) and next day I decided to give it one more try before dumping the whole set in the dumpster since nothing worked in the past 4 months (EEPROMs, transistors...). Sure enough the tv is working just fine for 2 days now (roku and plex mostly) with no issues whatsoever.
I'll post back if/when (hopefully...
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Re: Vizio P502UI-B1E has no backlight, no voltage from driver board to LED's
Same issues here, same symptoms.
Checked Q210 - Good
Checked D9202, D9204 & D9206 - Good, steady 24v.
Ribbon cable ok.
Replaced EEPROM twice, no difference.
Currently no one has my mainboard on stock (VIZIO P502UI-B1E XECB0TK004060X 715G6924-M01-000-005K TPT500DK-QS1 REV.SC1E). Vizio = POS
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