got a jvc tv that was dead all but 5v stby, no 12v no backlights went thru the circuit these mains cost over 100. well turns out the culprit was a small transistor marked 2a 3906 switching transistor. if you have a dead board for this set you may want to try checking this marked ua4 right below the lead from the power board and the fuse. it is small and a bugger to get out.
jlc47bc3002 dead main
Collapse
X
Related Topics
Collapse
-
by Asraf AtbHi everyone,
Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.
Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.
I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue....1 Photo -
by cheeky2I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection... -
by Dani_2024Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this...5 Photos -
by dokmaHello forum!
This is my fourth post so I will try to start on the right foot by doing it properly right off the bat. I bought this plasma faulty to play around with. The main board is completely burnt. When I unplug everything but the power supply and the main board and I plug in the power chord I get plenty of smoke from the main board.
Now, the model of the TV is a bit of a detective work. I couldn't find the model of the TV anywhere on the back cover or inside so I deduced it from the main board codes. SO I THINK this is PS50Q97.
Now, since the board is... -
by fharris1977Hi. Anyone who has experience with these vizio sets, which pin on this connector is the standby, the 5V pin? Trying to rule out the PSU before ordering a mainboard. I'm getting 0 Volts on all pins on this connector. Trying to jump the standby and PS ON pins to see if the PSU is functioning. Thanks in advance.1 Photo
- Loading...
- No more items.