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I have a 70 inch that is flashing the Sharp light and will…

Customer Question
I have a 70...

I have a 70 inch that is flashing the Sharp light and will not come on. Model # LC70C6400U

Technician's Assistant: Is your LC70C6400U connected to a surge protector or power strip?

We have tried several times with the unplug, hold volume down with input and replug . It only flashes again after several seconds

Technician's Assistant: Have you tried to power reset your TV (unplugging the power for 1-2 minutes, then plugging it back in)?

Yes

Technician's Assistant: Anything else you want the TV Expert to know before I connect you?

Just need it on

Submitted: 2 months ago.Category: TV
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Answered in 1 minute by:
5/29/2018
TV Technician: Nathan, Installer replied 2 months ago
Nathan
Nathan, Installer
Category: TV
Satisfied Customers: 31,366
Experience: Custom home theater installer, authorized dealer top brands.
Verified

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.

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TV Technician: Nathan, Installer replied 2 months ago

Unfortunately, the issues you are experiencing are symptomatic of an internal hardware defect, meaning a faulty power supply 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 2011 model tv, that type of failure wouldn’t be surprising for this brand. This set is significantly past its service life at this point.

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 $400 for diagnostics, parts, and labor, assuming parts can even be found, which is unlikely. Even if fixing, you will not extend the life of the tv any appreciable amount, perhaps a few months, but not years+ before other parts continue to fail.

For a tv of this brand/age however, replacement will make more sense. You can get a brand new 4k LED tv with a fresh warranty, from a more reputable brand, in the $1000 range.

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

My apologies for the news,

Nathan

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TV Technician: Nathan, Installer replied 2 months ago

Hello, it appears your question is still open.

Do you need more help with this?

Please note: You have already paid your fees 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.

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