Sharp LC-50LB370U Where to buy LED Strips?

[Gorrillasnot]

Re: Sharp LC-50LB370U Where to buy LED Strips?

budm, The last LED on strip 6 was dead and when I removed it it was bridged. I didn't have any solder wick and trying to unbridge it with just my soldering iron didn't work, so I got the not so bright idea to snip off the last LED of sting 6 and replace it with 1 of the LED strip pieces I bought not realizing it would cause all the headaches that it did.

Is there anyway to fix the spotlight looking circles?


thanks

[mmartell]

Re: Sharp LC-50LB370U Where to buy LED Strips?

I had a quick look at my disassembled panel. I only see three sheets - a thick plastic sheet which goes against the light box and two other ones which seem identical sandwich themselves between the thick sheet and the panel.

Keep in mind the few times I've done this type of job I've removed the back from the panel so as not to disturb the LCD screen too much so if this doesn't help much let me know and I'll disturb them a little more for you.

[mmartell]

Re: Sharp LC-50LB370U Where to buy LED Strips?

And mine had three open LEDs as well - one in each pair. There was a fourth that lit with my Led tester but wouldn't respond to the dmm diode test so was probably drawing too much current and replaced that one as well.

Only had a few Samsung Edge lit LEDs so used those. Brightness is good but the colour temperature is off by a bit. Keeping this so my wife can watch Netflix on it and she doesn't have the discerning eye that I have so won't bother her

[Gorrillasnot]

Re: Sharp LC-50LB370U Where to buy LED Strips?

I had a quick look at my disassembled panel. I only see three sheets - a thick plastic sheet which goes against the light box and two other ones which seem identical sandwich themselves between the thick sheet and the panel.

Keep in mind the few times I've done this type of job I've removed the back from the panel so as not to disturb the LCD screen too much so if this doesn't help much let me know and I'll disturb them a little more for you.

Thanks for the info on the sheets..I took the TV back apart and your right there are 3 sheets. I have the thick frosted down first, then a sorta clear shiny sheet and the top on mine is a thin white sheet.

I think I had them on right, but I handled them with bare hands (big mistake) and they separated a bit allowing dust and pet hair to get on them along with finger prints.
I tried my best to clean the sheets with a micro fiber cloth which helped a bunch, but I think I killed the screen on reassembly as I now get no picture at all..It could be that I dont have the tcon cables seated properly (I hope that's it).


So when you take a screen out you lay it LCD side down? I may try that if I mess with a TV with back light trouble in the future.

thanks

[mmartell]

Re: Sharp LC-50LB370U Where to buy LED Strips?

In your previous pic you can clearly see many of the individual leds on four of the strips.

There is not a one lit of the middle two strips.

Do the flashlight test and see if there is indeed a picture and your backlights have not burned out again.

[mmartell]

Re: Sharp LC-50LB370U Where to buy LED Strips?

Ran into my own problem on reassembly going to post it as a new thread...

[Gorrillasnot]

Re: Sharp LC-50LB370U Where to buy LED Strips?

You was right. The TV had another LED that went out killing the middle 2 strips.
I replaced the LED and all the strips were back to working.
Everything went fine until I was putting on the front bezel that holds the panel down. I was trying to get the left corner on and it was being stubborn.
When it finally let go and went on it cracked the LCD in the corner. ugh!
I think the LCD must of not been flush with its mounting surface.

Would that kill the whole panel though? if so that's a shame because it could've still been used as a garage/basement/kids TV.

Oh well if it's game over I have some spare parts and it was fun to tinker.

thanks

[mmartell]

Re: Sharp LC-50LB370U Where to buy LED Strips?

Odd, I would expect to see some evidence on screen even if it were broken. Double check your connections. If everything looks good try running with only one panel ribbon connected one side at a time to verify broken panel.

The reassembly is tricky with all the slot and groove trim pieces. I found out one of my sheets had slid down out of place. It's adjusted now will have a go tonight at getting these pieces in place and the bezel on for a test.

[Gorrillasnot]

Re: Sharp LC-50LB370U Where to buy LED Strips?

I tried reseating the cables and testing with 1 cable attached at a time and still no luck. Either the panel is completely kaput thanks to that small crack in the corner or maybe something shorted out somewhere.
I also rechecked all the voltages and everything is good in that respect.

Those plastic pieces that hold down the sheets are a real pain to get back on..I struggled for over an hour to get them snapped back in.

On a positive note this was my first attempt at repairing backlights and although not successful on this TV I took what I learned and successfully repaired a 39" Proscan that had 3 dead LEDs.

let me know how your TV turns out..hopefully you'll have better luck then me.

thanks

[mmartell]

Re: Sharp LC-50LB370U Where to buy LED Strips?

It took me a bit of time to figure out how those trim pieces were meant to be seated. After that and realigning one of the sheets it went pretty smooth. I found the tcon cables we're at a bit of an angle and didn't want to seat properly either.

I don't see any difference between the LEDs I used vs the stock LEDs.

[Gorrillasnot]

Re: Sharp LC-50LB370U Where to buy LED Strips?

looks great..I never could get my screen to work..guess I'll take the screen out and use whats left for a shop light lol

[ajshoe]

Re: Sharp LC-50LB370U Where to buy LED Strips?

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