Re: LG 70LB7100 no backlight after 2-5 min
Thanks for the reply guys I stressed the fets with a hair dryer and it seemed to quicken the time to shutdown. I didnt see any bad solder joints the set belongs to a friend and he is impatient so he decided to order a new power supply will update when it arrives.
madcow007
Member
Last Activity: 11-14-2023, 02:55 PM
Joined: 11-06-2010
Location:
-
Re: LG 70LB7100 no backlight after 2-5 min
ReeceyBurger123 thanks for the reply I finally got the set down today I can see proper 52v until shutdown the area on the pcb where the fets are located look a bit brown from the top side and it feels warm to the touch after shut down but not HOT
Photos attached please excuse typos and wall of txt I'm on mobile....Leave a comment:
-
Re: LG 70LB7100 no backlight after 2-5 min
Budwich just ran the test with a white image and I seen no distortion then at around the 3 minute mark the backlights shut off.Leave a comment:
-
LG 70LB7100 no backlight after 2-5 min
I have a LG 70LB7100 just a few months out of warranty. When I power the set on it works perfectly for 2-5 minutes then the backlight will go out and audio will remain. I can power cycle the tv again and backlight returns.
The tv is currently wall mounted so I'm unable to take photos of the boards until I get some help to remove it. I was wondering if anyone could recommend some trouble shooting steps to determine if its the power supply or the LED,s.
Thanks -
PN51D530A3F X-main compatability question
Hello I'm trying to find a compatible X-MAIN for PN51D530A3F I have pulled the following from the X-MAIN.
However I have been unable to find an exact match I was wondering if a board with same [B]PBA NO[/B] and different [B]REV NO/PBA REV[/B] would work?Hello I'm trying to find a compatible X-MAIN for PN51D530A3F I have pulled the following from the X-MAIN.
However I have been unable to find an exact match I was wondering if a board with same [B]PBA NO[/B] and different [B]REV NO/PBA REV[/B] would work?Hello I'm trying to find a compatible -
Re: 47LN5400 2 seconds to black
Thanks for the help guys guess this one is destined for the dump pretty sad really isn't very oldLeave a comment:
-
Re: 47LN5400 2 seconds to black
Would this indicate bad LEDs? Are there any other trouble shooting steps you would recommend?
ThanksLeave a comment:
-
Re: 47LN5400 2 seconds to black
At power on I get roughly 100v then settles to 77v I have similar result with LEDs disconnected.Leave a comment:
-
47LN5400 2 seconds to black
I have a 47LN5400 that will turn on however the backlight will only flash momentarily. I'm reading around 77v on the LEDs but output should be around 100v.
I have found a reasonably priced power supply but would love a second opinion before pulling the trigger.
Thanks... -
Re: New Members - please post your introductions here
Hello everyone
Long time lurker first time poster I just like to dabble with electronic repair in my spare time.Leave a comment:
No activity results to display
Leave a comment: