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LG 55UF6450 .....red power light is on.Hit remote...light…

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LG 55UF6450 .....red power...

LG 55UF6450 .....red power light is on.Hit remote...light blinks twice ...screen lights up..appears normal ,nothing else...Tried a new T con board. No difference..checked power on pins at Main board (has the hdmi, usb, audio

Technician's Assistant: Is your 55UF6450 connected to a surge protector or power strip?

No

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?

Ou LG 55UF6450 .....red power light is on.Hit remote...light blinks twice ...screen lights up..appears normal ,nothing else...Tried a new T con board. No difference..checked power on pins at Main board (has the hdmi, usb, audio) ...2 pins have 13.25v....2 have 3.48v....thats about it on voltage..red led on this board is on...another red led inside a small case with a push down lid is also on

Submitted: 7 months ago.Category: TV
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Answered in 4 hours by:
12/5/2017
TV Technician: Pete, Electronic Engineer replied 7 months ago
Pete
Pete, Electronic Engineer
Category: TV
Satisfied Customers: 20,386
Experience: Over 16 years of experience installing and repairing electronics.
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Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.

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TV Technician: Pete, Electronic Engineer replied 7 months ago

Is this your own TV or one that you are fixing for someone else?

Did you recently have any power outages or thunderstorms?

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Customer reply replied 7 months ago
Own,... not that i know of on power outages and we it was not hooked up through surge protection..guees it should be .right
TV Technician: Pete, Electronic Engineer replied 7 months ago

Have you tested the voltage outputs from the power supply board?

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Customer reply replied 7 months ago
The numbers I posted were tested at both ends of the cable from the power board to the. HDMI board. I don't see a diagram showing definite What pin should have what voltage. I saw one LG board that did but not mine.
TV Technician: Pete, Electronic Engineer replied 7 months ago

See page 33 onwards of the following service manual for the pin voltages:

https://encompass.com/shop/model_research_docs/?file=/ZEN/sm/55UF6450UA.pdf

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TV Technician: Pete, Electronic Engineer replied 7 months ago

Hi, just checking in on your question. If the issue is resolved or you do not need anymore help, please rate our session as 4 stars or more and press submit so I am credited for my time, otherwise please reply back so we can continue with the issue.

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