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Our Panasonic flat screen went blank. We can turn it on with…

Our Panasonic flat screen...

Our Panasonic flat screen went blank. We can turn it on with remote but no image appears and then remote won’t turn off. If I turn it off with power button on tv the realigns blinks

Technician's Assistant: What's the brand and model number of your TV? How old is it?

It’s a Viera 42”. TC- P42ST30. 7 years old

Technician's Assistant: Does the TV menu work? Do you have the same problem on all sources/inputs?

Can’t change inputs. I turn on tv and you here it turn on and red light turns on but nothing happens. Went blank while watching it last night

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

Don’t think so

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Answered in 5 minutes by:
3/13/2018
Nathan
Nathan, Installer
Category: TV
Satisfied Customers: 30,809
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.

Ask Your Own TV Question

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. This tv is significantly past its service life at this point and plasma technology is long obsolete.

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.

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 $300 range.

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

My apologies for the news,

Nathan

Nathan
Nathan, Installer
Category: TV
Satisfied Customers: 30,809
Experience: Custom home theater installer, authorized dealer top brands.
Verified
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