Re: Samsung / Hansol BN44-00428b

I'm investigating a UE55D7000 with a BN44-00428B PSU. Cycles On-Off so I checked the joints on the transformers first. All OK.

Then measured the output voltages of the 4 LED drives, which pulse high just upon switching on, but one of them gets much higher than the other three. The one at D9451 reaches way over 200 Volts, and the other three just over 170 V.

So I'm assuming that one of the backlight strings has an open circuit / bad LED.

Giving up. Or is it feasible to replace the broken LED string ?

Re: New Members - please post your introductions here

My Nick: au.vi is the abbreviation of Audio & Video.

I repair various consumer electronics devices, and have some special experience with Philips hardware. Anything from 50 year old tube radio's to recent LCD TV's. Fixed multiple Streamium audio sets. But also car audio, DJ gear, etc.