RCA 32 lcd tv

[nelfig]

Re: RCA 32 lcd tv

so i got my new inverter in and it still dont work the power board was tested and good so now im thinking it just could be screen itself lmk what you think

[budm]

Re: RCA 32 lcd tv

"also check pin 14 (??? PWM) to see what you have" so what do you have at pin 14 when check with DC meter and an AC meter?

[nelfig]

Re: RCA 32 lcd tv

ok so today what i noticed with the new inverter installed this is what happens i hear a buzzing sound by the inverter area now if i unplug one of the 4 tube connections the buzzing goes away but the tv still turns off after 5-10 seconds now could it be a bad panel or bad t-con board

[Luccio]

Re: RCA 32 lcd tv

Hi people,
Just letting you hard working people know, troubleshooting is not easy I know. I just spent 3 days on my RCA, first on the PS even though no CAPS looked bad. The voltage may have been low after ware, which might have been a problem, the output caps that is. Deduction dictated that the PS was good. Next came the Mainboard, no bad caps on there either, but then thats not how we test a MB. I removed the MB from the set and placed it in the freezer for 10min... Nothing touchy the Board but cold air!!!

This may require putting flathead screws in the original screw holes from underneath the MB and on an aluminium pan. What happens is the MB may have a bad contact under that chip with a heatsink on top. Considering that airflow behind this product is very limited, the chip may have heated and on power off the soulder may have cracked by cooling. The freezing of the MB, and reinstalling it for a quick test may prove usefull. If it is the case, the TV might turn on with the MB cold, not only will this work once, but the MB will have to be placed in the oven at 400F for 9min. The MB must be mounted on 4 screws so it hovers over a low pan. Let cool after heating for at least 60min. A process called 'cooking'

The soulder on the MB, the whole MB becomes liquid, don't touch until cool... and easy on that over door. All cracked soulder reintactes and connection flow properly again.

Thus my symptoms on my TV where, standby red light on, upon pressing power the led would change blue, and once in a houndred attemps the BackLight would come up and the logics would kick in. Logics meaning, menu items, settings, etc. If the TV didn't come up, logics and all, it would have to be unplugged as the MB logics didn't work, and side buttons and remote wouldn't work either.

Trouble shooting stopped there for me... TV was now good... Next step, remove the planned obsalescence, as to make sure this doesn't happen again.

1 1/2 hole with a drill in the back panel cover just over the heatsink of the MB so as airflow retuns better than normal. This might do the trick, but just for the hell of it I added a 12V small computer heatsink fan, glued to the outside cover.

Have a good time people and remember, Never give up Never surrender!

Luccio

[joseang_14]

Re: RCA 32 lcd tv

greetings from Venezuela want help me in repairing this power supply is the same as the pictures MEGMET MP116AL but my doubt is that numbering is the transistor Q9 Thanks