20 Most Recent LG 47LC7DF 47 in. LCD HDTV - Page 6 Questions & Answers

Seems to be a common problem with these 47 LG models. There were some models recalled recently ny LG. If you contact LG and comlain about this problem ypu may be able to have it fixed Its faulty control boards

seems to be common faults with this model in LG there have been a number of their models recalled to fix power board and the video controllers

Some of these LG models have ben recalled due to faulty power boards. You might want to check it out on the net

Failing Ic's on the control board

Well dont keep it on!

By running it after it shutdown and it finally did its last pop that added another $XX to the parts bill.

The control boards (2) have now failed There are burned Capacitors ( pop!) and possibly even a few transistors burned out. This is not a DIY it is a Tech job as once changed these boards require additional tuning of the convergence factor.

As this is new and is already having power problems return it immediately. This is a known problem with LG and is an expensive repair if you get stuck with it. Some LG's have been recalled to chainge the power and video boards. You shoulnt have to put up with this problem when the set is new. If you can swap out an LG for a Toshiba or another top brand go for it . LG has motre of these problems on this forum than any of the top brands.

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Sounds like a overheating issue. Try facing a large fan blowing across the back of the unit and see if this changes anything. If it does, it might help to blow the back out with compressed air as dust might be helping it overheat.

This could be a bug in the firmware. LG has a firmware upgrade which is loaded onto a USB stick and plugged into the HMDI port and the TV is reflashed. Try going into the menu and doing a factory reset. Just incase the TV has somehow gone into a diagnostic channel search mode. This may clear the problem.

IR senor may not be bad. Try using a different remote (universal) and program to TV. If universal remote works and your doesn't, you may need to purchase a remote instead of IR board. If you confirmed that the IR board is bad then replacing the IR board will fix the remote issue. IR board is an easy fix. Just open the back cover out and it's located right in the middle toward the bottom of the TV.

the software in the main control is damaged. call your lg servicer in your area. he might get you a software update

Could be the power supply gone bad.
No easy solution I'm afraid.

When problems arise that kill both video and audio, it is normally related to the failure of the main power supply.
Nearly all modern electronics uses a 'switched mode power supply.'
They are more efficient while being much more complex and prone to failure but offer the added benefit of being designed so a 'downstream' fault will cause the supply to shut down to avoid setting fire to your home.
The supply itself will also cycle if it has an internal problem; once again, to prevent destroying itself or anything dependent on its outputs.
 
Supplies built a couple decades ago could only do this by blowing a fuse and there are conditions that can occur that would not blow the fuse but would allow overheating and further damage as well as fire.

You might try the following: Pull the AC plug from the wall and ignore the set for a day or overnight, then plug it back in.
There are literally millions of semiconductors in a modern TV receiver and sometimes, they trip and lock themselves up.
When that happens, removing all power from the unit will allow everything to return to a stable state and function as designed again.

If that doesn't help, I hope your set is still under warranty as this could be a multiple hundreds of dollars to repair.
The power supply is often on a separate board and unfortunately, component-level technicians aren't that common anymore so frequently, the board is replaced and the old one discarded.

Do all your programming with the original remote & then set the ATT umiversal remote to turn the set on/off & it should do most of the features of the original. Some stuff can only be done with the oem remote. Read the book & good luck!! tvman

Most Polaroid flat-screen TVs won't program to the Uverse remotes. Try buying a different universal remote that shows coding for both Uverse and Polaroid.

got to go through your settings and set it to 1080 p if it did not come pre set to that setting..it should have....

I ordered a Sanus VMB1 kit for the some problem and I believe it should fix it for mine.

When you turn it in, do you get an image? And if it is the LCD screen ( not the front protected glass) then yeah you might as well junk the TV. The cost for a replacement LCD screen exceed the cost of the unit. Sorry about the bad news, just being honest. Turn the television, if the LCD is cracked, then you will see it right away when the television is turned on.

I am having the same problem, is there any solution for this problem?