Re: Samsung UN40H5203AF LED backlight out

This is really strange. I swapped the top and bottom LED strips which appear to be the same, and BINGO all the backlighting turned on. We'll see if it lasts, but for now I'm a happy camper.

Re: Samsung UN40H5203AF LED backlight out

Ok, a little more diagnostic info. I was able to get to the strips. There are 3 LED strips. All the LEDs appear to be lit, but extremely faintly. Have to put a towel over my head to see them.

I measured about 120V across the top strip, but only ~17V across the middle and bottom strips.

Also, at one point I accidentally had my meter in continuity/diode test mode instead of voltage when connecting across the +/- terminals on the first strip. The middle and bottom strips immediately lit up to full brightness while...

Re: Samsung UN40H5203AF LED backlight out



This looks very similar to how mine is setup. Thanks!...

Re: Samsung UN40H5203AF LED backlight out



This one is backlit instead of sidelit, so it's a bit different. I'll get it figured out though.

Thanks for the pictures...

Re: Samsung UN40H5203AF LED backlight out

Do you know how I get at them to replace them? (If I'm able to find replacements)

I've tried searching all over and haven't been able to find any disassembly instructions that go down that far. I tried taking the front bezel off and with the panel separated I could see them behind the diffuser, but going through the front didn't seem to be the correct way.

Hi, I'd appreciate any help. Bought a non-working Samsung UN40H5203AF LED TV today. I've done the flashlight test and I do get a picture, but the LED backlighting doesn't come on. I've also tried disconnecting the main board from the PSU / LED driver and they still don't come on.

It seems likely to be either the PSU or a blown LED, but I'm not sure which.

Here are the voltages measured on connector CNL802:

1 D+ (no wire here): 209
2 D+: 209
3 S1-: 57
4 S2+: 57
5 NC (no wire here): 0
6 S2-: 30
7 S3+: 29
8 D-: Started...

Re: SAMSUNG led un32eh4003f Plays melody No picture & led blink

How did you guys actually get at the LED strips? I have a similar model UN40H5203AF and I could see them if I took off the front bezel and separated the panel. However, I imagine I'd want to go in from the back somehow to replace them?