Mulja tv repair portal

Equipment Repairs => DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder => Topic started by: EVILMRB on June 25, 2021,19:32:39

Title: lg ubk80 uhd no power
Post by: EVILMRB on June 25, 2021,19:32:39

Anyone worked on one of these yet, mine is totally dead. The electrician who came to service my home kept switching are power on and off loads of times and I noticed when I came to use my machine it was not working. Any help would be very grateful..

UPDATE..

I have got this machine working by bypassing the power supply (PRIMARY) and run a 12v power adapter to the 12v feed and the machine came on and it all worked. I have a really weird suspicion the Optocoupler is at fault. All I want to know if this is a safe way of doing this. :72:

I uploaded a picture of the power supply.

Title: Re: lg ubk80 uhd no power
Post by: downunder on June 27, 2021,05:31:02

That's a rather unorthodox way of doing things. Have you tried tracing the 12V rail from the psu output connector back to the yellow transformer,. It may just be an open fuse (probably on the underside of the board). But if an external power pack works, so be it.                           Bruce

Title: Re: lg ubk80 uhd no power
Post by: EVILMRB on July 04, 2021,21:24:38

You was right it was a fuse underneath some glue like substance, so thank you for the heads up. :c017:

Title: Re: lg ubk80 uhd no power
Post by: downunder on July 05, 2021,04:52:36

You're welcome. Thanks for the feedback. Good to know you solved it.