Sharp aquos LC-40LE810E

[Nightmare0]

Hello

First of all I am not professional and not native English speaker. So sorry in advance, if I don't understand something on first time. I have basic electronic knowledge, multimeter, soldering iron and skill. I have a lot of experience in xbox repair, modifying, ....

I have Sharp LC-40LE810E tv.
I think there is faulty power supply. I found a lot of threads here but I couldn't resolve my problem.

When no try to turn on my tv, it won't start. It won't even light up led tubes. I can hear some coil noise from power supply. There is only flashing middle blue triangle (standby probably) led.
It is flashing like. Flash, flash, pause. And again.
I tried measure both led tubes, I am getting same resistance on both of them, so I assume tubes are good. When I try to measure led tubes output I am not getting any voltage. I was checking there aren't any leaking capacitors.
I tried many reset tv combinations, it didn't helped. Optically I can't see any damage or burned parts.

Could you guys guide me what to measure or try to find fault? Or at least help me to figure out what part is wrong, so I can buy some power supply replacement.
I will provide any pictures you will need, just let me know and I will provide everything needed

Thank you

[freakaftr8]

Re: Sharp aquos LC-40LE810E

Is it one long flash followed by two short flashes and over and over again?

[budm]

Re: Sharp aquos LC-40LE810E

Please up load good clear pictures of the whole back side of the TV so we can see all the boards, then the pictures of each board.

[Nightmare0]

Re: Sharp aquos LC-40LE810E

Hello

Thank you for your quick answer.
Led is flashing only maybe 1 second flash, 1second flash 1 second pause. I will upload some video, so you can see it by yourself and we can avoid misunderstanding.

When I hit power button on touch panel, tv seems to trying to start up. I can hear change noise from power supply but led won't light up. After maybe 10 seconds tv will go back to flashing.

Unfortunately, currently I am at work. I will make you video of flashing, photos of all boards.

[Nightmare0]

Re: Sharp aquos LC-40LE810E

I just found service manual online. I found out, that I have to push menu button to get secondary flashing. It was said to use remote control. But I don't have any. I hope, i can use menu button on front panel, can I?

[freakaftr8]

Re: Sharp aquos LC-40LE810E

yes as budm said please upload pictures of the back of the TV I worked on one of these before. Actually I worked on quite a few of them. You may have led failure if you have one long one fast blink. this model is plagued with LED failures in the strips. mostly the upper right hand LED burns out on the right top side strip of the TV. before jumping to conclusions so I should recommend that you test to make sure that your power supply is attempting to output dc voltage to the LED strips.

worst case scenario you have to remove the bezel and the lcd panel and all the diffusers to access the led strips.

[Nightmare0]

Re: Sharp aquos LC-40LE810E

Hello

Sorry it took me so long. I fall asleep after night shift. Here I uploaded some photos of power supply and mainboard. I hope you can see everything you need. If not, just let me know. I will try to take better photo.

Here is video of flashing led.

https://sendvid.com/6uwvzgz8

When I hit menu button on front panel, it won't change anything.
If I am correct it should be power supply error. But I don't know how to get some secondary error.

I tried to start tv and to measure voltage on led output. But I couldn't measure anything. I can try to measure it again.

[freakaftr8]

Re: Sharp aquos LC-40LE810E

Look at the video that's an interestin blink code.. that's like 2 - 2.

Led failures are 1 - 1 blinks. Meaning one long and one short blink.

Tcon and panel failure is two long, five short blinks.

You're getting two short blinks. Now this could be code 2 - 2. I'm not sure. Unless we are really seeing 1 - 1. Then that would indicate led failure or backlight failure as sharp would put it.

[budm]

Re: Sharp aquos LC-40LE810E

It does look like 2-2. I did not get the service manual to see what the code 2-2 is yet.

[freakaftr8]

Re: Sharp aquos LC-40LE810E

Without the service manual the only thing I've managed the drum up on the interwebs is that code 2 - 2 is some unknown power supply failure. Let's not double down on that yet until we find out from the service manual

[budm]

Re: Sharp aquos LC-40LE810E

Service manual from ELEKTROTANYA.
Need to start checking Voltages.

[Nightmare0]

Re: Sharp aquos LC-40LE810E

Wow, you are quick.

So that means my failture is

Power Error 2 UR+13.5V error (*2) ?

Could you guide me a little, where should I start to check voltage? And mainly what shoul I be lookong for?

Thank you

/edit

On page 41 I found some volage guide. Is it that? can I measure voltage only with connected power, or should I connect power supply to mainboard and everything?

[budm]

Re: Sharp aquos LC-40LE810E

Your pictures of your power supply board (DELTA DPS-126CP-1A) are cloudy and not in focused for me to be able to trace out the connections of the board or able to read the pin names of each pin of the connectors. I also need good clear pictures of the bottom side of the board. Shopjimmy does not have good clear picture either.
You need to check the UR 13V pin on the power supply board.

[Nightmare0]

Re: Sharp aquos LC-40LE810E

Here I found one picture of this board. Sadly its only part of bottom board.

I can try to make better pictures. If I won't be able to take good photos, I will borrow camera from my sister and provide better photos

[budm]

Re: Sharp aquos LC-40LE810E

Check the Connector PD pin 1& 2.
Where did you find that picture? Is there the picture of the whole board?

[Nightmare0]

Re: Sharp aquos LC-40LE810E

No I couldn't find whole board. Its Just from some polish site i found on google images. Here I uploaded some photos of board. I think they are better. But I couldn't find any tool to connect them together. Do you think it will help and dou you will be able to read that? If not I can try to do that in paint maybe

[Nightmare0]

Re: Sharp aquos LC-40LE810E

Sorry for my stupid question. But as I said I am not professional electrician.
How should I measure that?

One probe on Pin 1 second probe on Pin2 on DC, right?
Because I am not getting any voltage, when I measure that like that.

[budm]

Re: Sharp aquos LC-40LE810E

Meter in DCV, Black probe on the chassis, Red probe on either pin 1 or pin 2 (pin 1 and pin 2 are tied together so it does not matter if you use pin 1 or pin 2), then turn on the TV power switch and see what you get.
You might as well check all the Voltage of the PD pins, you MUST put the pin names after the Voltage readings so we can tell what else is missing.

[Nightmare0]

Re: Sharp aquos LC-40LE810E

Sorry I was measuring with mainboard disconnected. Now I connected mainboard and started to measure again.
I was measured as was advised. Touched probes and turned on. Turn off. Change probe to another pin and turn on again....

So final voltages are:
PIN 1 - 12,9V
PIN 2 - 12,9V
PIN 3 - 12,9V
PIN 4 - 12,9V
PIN 5 - 0V
PIN 6 - 0V
PIN 7 - 0V
PIN 8 - 0V
PIN 9 - 0V
PIN 10 - 3V
PIN 11 - 4,9V
PIN 12 - 12V

Sorry for bad measuring before

[budm]

Re: Sharp aquos LC-40LE810E

Please provide the pin names of each pin so I know what I am looking at as requested in post 18: MUST put the pin names after the Voltage readings so we can tell what else is missing.