Sharp Aquos 70" LED LC-70LE632U does not power on

[alsic16]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Hey everyone, this is the ultimate thread that I've been using to troubleshoot my LC-70LE632U and I feel so close to the solution but need some help.

My set started throwing a 1-1 code recently. I'm able to boot into the K menu. Backlights turn off after ~10 minutes. Reset to factory, reset lamp, all that works fine. Every consecutive time I use the TV, the amount of time I have before it goes into an error state gets shorter. I've replaced the D7951 diode like everyone recommends to no avail. I bought an LED strip voltage tester and all of the strips seem to work fine at 181-183V isolated from the power board.

I'm at a loss for what to do next but hopefully y'all can point me in the right direction. Hopefully 7 years isn't too long a gap for fixing.

[read-eval-print]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

I just wanted to chime in and say that you all are a bunch of steely-eyed electronics repairmen.

I know this thread and this response are both a few years old, but I want to second this sentiment. I replaced the diode just as described, and it worked for me too. This saved my TV from recycling or a landfill and saved me several hundred dollars (at least) for a replacement. My utmost appreciation to you all.

[spoon-man]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

I just wanted to chime in and say that you all are a bunch of steely-eyed electronics repairmen.

I was able to pick one of these up for $100 because it wouldn't power on. Spent $2 getting parts, replaced D7951, and now it works like a charm! Thank you!

[tilden]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

I wasn't able to find an exact match to my SB2100 133, but I ordered this one from Mouser and swapped it in and my TV works great again.

http://www.mouser.com/Search/Product...y750-SB2100E-G

[Teletubbie]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

I've had the exact same issue with my TV and have taken out and tested the same diode and sure enough it is shorted when reading from either direction. Mine is a SB2100 133 instead of the SB2100 050 yours was, but I imagine the diode you used would work for mine? If so - do you still have any of those extras available and be willing to drop one in the mail to me?

I should have some spare diodes and I can mail one to you (I hope I can remember where I left). Send me your mailing address by PM. In fact, I am local to you in the triangle area.

[tilden]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

I've had the exact same issue with my TV and have taken out and tested the same diode and sure enough it is shorted when reading from either direction. Mine is a SB2100 133 instead of the SB2100 050 yours was, but I imagine the diode you used would work for mine? If so - do you still have any of those extras available and be willing to drop one in the mail to me?

[stereojohn]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Hi i am looking but cant find anything defective or short ? having no diagram sure does not help ...this is not the simplest tv to fix for sure .

[budwich]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

good, once you take the measurements especially around the inverters, you will likely find your problem... compare values across the inverters to see if there are any differences.

[stereojohn]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Hi i will do that thanks yesterday i tried the codes freakaftr8 mentioned and got the set to power on the back lights for 2 seconds aggain but not i have picture and sound just no backlight and a constant inverted light so i am really happy now i know the lcd and t-con are good what a relief just got to figure why the 420 leds dont stay lit they all look perfect nice and bright ?

[budwich]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

if you measure all the voltages printed on the boards and list them, people here will be as good as "having a working tv pb"... :-) they will likely indicate where you need to look from there.

[stereojohn]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Hi i am new on this forum and i am trying to fix my tv a , sharp 70le732u i have the 1 1 code iam thinking a bad power board or main board , i took appart the front lcd and frame off to see the leds and they all lit up evenly for 2 sec with vol and input and now i wish i had all the voltages from a working tv pb ...
help please.

[Biffm17]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Ok here are the pics of my set.

[Biffm17]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

ok, going to upload some pics in a few thanks!

[vinceroger69]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

We can help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board using the manage attachments button, which is found by clicking "go advanced" under quick reply.

[Biffm17]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Well we still do not know if the STBY is present or not when the TV stops working. Or it can be just simple bad solder joints, connections.

We'll there doesn't appear to be any bad solder joints that I could see but I will recheckall the joints today after work. That would be an amazinglycheap fix. There definitely are no bad looking caps that are bulging or leaking. If i get it to power back up whereally should I check for stby on the connector or board somewhere else?

[budm]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Well we still do not know if the STBY is present or not when the TV stops working. Or it can be just simple bad solder joints, connections.

[Biffm17]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Side note, I just moved the unit back out to check voltages on the board, screwed the power supply board back in and reconnected the wires and plugged it in screen down, and wouldn't you know it the damn thing came on! V logo was on, powered it down, set it up right and grabbed a chrome cast and repowered it. Came up and no errors or flashing lights! Ran it for about 2 minutes and then it went off again and won't power up again.... Is this just bad caps most likely? Should I really cap this bad boy and if so which ones would be beneficial to do first? Is there a good quality recap kit for it?

[Biffm17]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Yes, i did read post 46, with this board, I was not clear which pins were the standby pins or if there was an of place to check for it. This obeisance a large TV which is apart in my living room and the wife isn't too happy having it there... so I will try and look for more voltages .

[budm]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

'No flashing lights errors of any kind and no standby light. I was not too sure which pins were standby which was why I was asking. ' Did you read my post 46?

[Biffm17]

Re: Sharp Aquos 70" LED LC-70LE632U does not power on

Are you getting any flashing error code on the inverted v logo?

Nope, no lights at all