How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Nathan Your Own Question
Nathan
Nathan, Installer
Category: TV
Satisfied Customers: 25908
Experience:  Custom home theater installer, authorized dealer top brands.
59725966
Type Your TV Question Here...
Nathan is online now
A new question is answered every 9 seconds

LG 43UF6400 is flashing red,, blue and screens, It has not.

Customer Question

LG 43UF6400 is flashing red, green, blue and white screens
JA: Has this happened before? And have you tried unplugging your LG and leaving it off for a few hours?
Customer: It has not. I have just unplugged it finally to get the model number
JA: Does the TV menu work? Do you have the same problem on all sources/inputs?
Customer: I am not able to get a menu screen or cycle the inputs. The only button working is the power button.
JA: How long has this been an issue? What happened right before this popped up?
Customer: Just happened this evening. My wife says she pressed the tv button for some reason
JA: Is there anything else important you think the TV Technician should know?
Customer: No
Submitted: 3 months ago.
Category: TV
Expert:  Nathan replied 3 months ago.

Hi, I'm Nathan.
Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review and reply.

Expert:  Nathan replied 3 months ago.

Unfortunately, the issues you are experiencing are symptomatic of an internal hardware defect, meaning a faulty tcon board or main/control board, though there are many possible failure points. This issue could be a manufacturing defect, but is also often caused by a power event (shock/surge, prolonged over/under voltage condition, etc).

This could also be the result of age related wear and tear; as a 2015 model tv, that type of failure wouldn’t be surprising as these type of board failures are common after a few years.

There is one step you can take here, both as a possible fix, as well as a diagnostic evaluation:
1) Unplug the power cord from the outlet

2) Wait at least 1 hour (60+ Minutes)

3) Press and hold the power button (on the set, not the remote) for 60 seconds
4) Keep holding power button while plugging back in, and for another 60 seconds after. When plugging back in, go directly to the wall outlet, bypassing any power strips or surge protectors.

If this reset process does not work, it would unfortunately confirm an internal hardware failure.

This is something that would require repairs to correct; if you're thinking about a do it yourself repair, you'll need to be comfortable and skilled with electronics repairs, which could include dismantling the set (removing the back panel of the tv), diagnostics testing with a multimeter, changing out boards as needed, and possibly desoldering/removing and soldering/replacing individual components.

If you’re considering repair at a local shop, you’ll find a typical repair to be around $300 for diagnostics, parts, and labor.

For a tv of this size/age however, replacement will make more sense. You can get a brand new LED tv with a fresh warranty in the $400 range.

I can help you with finding parts, finding a repair shop, or recommending replacement options, if desired.

My apologies for the news,

Nathan

Expert:  Nathan replied 3 months ago.

Hello, it appears your question is still open.

Do you need more help with this?
If so, just reply back on this page. If I’ve answered your question, please let me know you are satisfied, to conclude our session – this is the only way I am credited for my work as an independent technician.

Please note: You have already paid your fee to the site; I'd like to help you and provide value for that fee, but I do need to communicate with you here to do so, if more help is needed.

Nathan

Customer: replied 3 months ago.
Luckily I bought an extended warranty when i purchased from best buy. They are evaluating the TV now. I forgot I did this. Good surprise.
Expert:  Nathan replied 3 months ago.

Great news, glad to hear that it will be covered for you!

If you have any other questions, just let me know. Otherwise, please take a moment to rate my service as this is the only way I am credited for my time. Hopefully I have earned 5 Stars but if not please let me know what I can do to ensure you are satisfied. I also invite you to contact me directly with any future support needs at http://bit.ly/2rRmuH2 and ask for Nathan.

Thank you, ***** ***** a nice day,

Nathan