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

[budwich]

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

just ensure the tv is plugged into a working socket. Hope you know how to use a multimeter to measure things. Be careful as you are going to "visit" areas that can kill you if you do things wrong with your fingers. Measure the voltage coming into the set. It should be line voltage. It is likely going to some form of switch power supply / rectifiers. check some points around the area to see what you find... there should be labels at connectors, at some various points if you are lucky. You can work either forward from the incoming ac plug or backwards from the connectors leaving the power board.

There are service manuals on this site (search / look around), although typically the power supply is not included but some info can be gleamed from the other board's info.

People (good guys) will respond to you IF you post good info (hint -> pictures.... read the sticky on how to use the forum / posting).

[Teletubbie]

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

Tried the reset procedure and there is no response from the TV.

Should I power up the TV when I check the voltage?

Here is a higher resolution image of the power board from ShopJimmy.

[budwich]

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

:-(

you can try to reset the tv... unplug the set. then on the side panel, depress volume up and channel down at the same time, hold, and then plug the tv back in.... do you get any response. (note release, the buttons once something happens).

Further, get a meter and follow the power in from the cord to the power board and check a few point s there after to see if it is actually getting anything. Go from there... there should be voltage labels on the board to help you "trace things".

[Teletubbie]

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

I checked the fuse on the power board. How do I check the standby?

[awyatt2]

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

you don't have standby, look at the power board and see where the stby comes from, have you checked fuses?

[Teletubbie]

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

Can anyone help me troubleshoot my TV?

[Teletubbie]

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

Disconnected the cable from T-con to the main board and it did not power up.
There are two more ribbon cables that run from T-con to the bottom of the TV panel. Not sure how to disconnect them; cannot find any tabs to press. I do not want to try something and damage that cable. Any suggestion how to disconnect the T-con ribbon cables?

Edit: Found out here how to disconnect those ribbon cables.

Disconnected both the cables one at a time and then disconnected both together and it did not power up the TV for any of the cases.

Let me know what voltages do you want me to check on the power board.
Thanks!

[budwich]

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

disconnect one of the two tcon cables and see if it powers up. If not, try the other. Still if not, disconnect both. After that still nothing, you need to start checking voltages on the power board.

[Teletubbie]

I have a 4-year old TV that was working fine all along until last week it just turned off while watching a show. The power light on the front panel does not come on when you try to turn on using the remote or the front power switch.

I have read all the related old threads on this forum and I need some guidance in troubleshooting.

I have attached the service manual, pictures of the back panel, power board, T-con board and main board.

I have a multimeter and a soldering iron if needed for repairs.

Thanks in advance.