Re: LG 42LD450-UA Powerboard replaced and still no power

It was 79v AC. Maybe it's the beers but I'm not sure what you mean by "ground cold ground to hot ground". I measured it with the black lead on ground and the red lead on each leg of the capacitor. I tested other capacitors and they had voltage on both legs. This was the only one that did not. No standby voltage on the secondary at all.

My LED tester lit up the back lights and according to LGs website "LG 42” Class Full HD 1080p LCD TV (42.0” diagonal), 42LD450 +6 ... This energy efficient...

I narrowed the issue down (so I thought) to the powerboard. I purchased one online and installed it but still no voltage coming out the pins. I have checked the LEDs with an LED tester I purchased and they test good. I put the TV aside for quite a while but with this Corona crap I have some free time. I am by no means an electronics repair person but I do enjoy fixing anything and everything. I am wondering if the board I bought online is defective. I found this capacitor (guessing that's what it is) and it has 79v on one side and 0 on the other. Everything I have tested on the primary side of...

Re: Insignia NS-55D420NA16 Backlight Problem

I used suction cups and had no issue taking it off or putting it back on. I was putting it back on until I ordered the new LEDs and I was ready to put them in. I didnt want to leave it all taken apart. It was one of the metal tabs on the side of the TV. Does the screen fit inbetween those tabs? If so it's like the screen grew 1/4 of an inch. It wouldn't go between them so I figured the screen laid on top. Then putting the clips on the side it cracked. I'm still irritated about it though. I was $35 away from having it fixed and...

Re: Insignia NS-55D420NA16 Backlight Problem

Ok. Well this repair was short lived. I just cracked the screen. Arghhhhhhhhhh!!! Little mistakes can sure make a person feel pretty stupid. I was hoping to learn from the original poster. Oh well. Thanks for the advice! I enjoyed tinkering with it and learning though.

Re: Insignia NS-55D420NA16 Backlight Problem

OK. I never got around to getting you the model number budm and I do apologize, but my LED tester arrived today and I went ahead and got down to the LEDs. 11 strips of 6 LEDs total. I have 6 strips each with 1 LED not working in the strip. 1 strip with 2 LEDs not working and 1 strip that none of the 6 will light up. Should I replace all 11 strips or just one strip and the other individual LED that are not working? Should I be able to test the strips with an Ohm meter to see a short?

Re: Insignia NS-55D420NA16 Backlight Problem

Man!! Yall Rock!! I will check the model number and post it when I get home feom work. Thank you!

Re: Insignia NS-55D420NA16 Backlight Problem

Question. The LED tester says 0-300V. Will that still work for my LEDs since I'm getting a 400V spike? Just not sure howmany LEDs are on my TV. I guess I should just pull the screen because if there are some LEDs out I will need to replace them anyway. With them all exposed I could test each strip individually.

Re: Insignia NS-55D420NA16 Backlight Problem

Awesome. I was measuring everything using black to chassis for ground. The LED output I wasn't seeing anything so I tried across the red/white. Thank you for the advice. I have an LED tester on the way. I will report back what I find. This is an awesome site!

Re: New Members - please post your introductions here

Hi everyone. Another newbie here. My name is Jimmye. I have 6 children ranging from 31 down to 4. I live in the Texas. (DFW area) I work for AT&T and a cable repairman, phone repairman, internet repairman and also work on T1's. I have been with AT&T for 19 years (April 2019) and I was an automotive mechanic for 9 years previous to AT&T. I am far from an electrician or electronics tech like most of yall but I love tinkering, learning and fixing things. My motto is "I will try 3 times to fix something before paying...

Re: Insignia NS-55D420NA16 Backlight Problem

**First post** Man that sucks. I have the exact same TV but when I check my red/white wires going to the LEDs I get a spike of a little over 400DCV then back to almost 0DCV. I am trying to remember if that was across the red/white or red only and to chassis for ground. (it's been a few weeks) My backlights do not even flicker. With the red/white wires unplugged I get 0DCV on both pins. My voltages on my 10 pin output are the same as yours. Not sure if I should order the LED tester or if it is the LED driver on the powerboard. Anyone have...