Hi, I have Hisense 50K23DG. It has no sound, no picture and 5 and half or as 6 red blinkings. Do you know any error code for this Hisense?

Hisense Blink Codes

https://techprofet.com/hisense-tv-blinking-codes/

LG Flickering is a known issue

https://www.google.com/search?q=LG+60LB6100-UG+picture+flickers

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Hisense TV Blinking Codes (Flashing Red light Fixed)

https://homespoiler.com > hisense-tv-blinking-codes
Oct 8, 2022 - If it blinks 2, 3, or 5 times, it means there is an issue with the backlight, mainboard, inverter, or power board. On the other hand, if the ...
‎Hisense TV blink codes concept · ‎Fixing the Hisense TV blinking... · ‎FAQ

More here and videos

https://www.google.com/search?q=hisense+tv+3blinks&

However, best advice. Balance how old and if it is time to upgrade. Hisense is a budget brand.

https://www.fixya.com/support/r29790007-repairing_own_television

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Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
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If it was an open "internal fuse" the error code wouldn't show!!!... bad advice...

I looked in my Hisense service manuals and 3 blinks error code is LED rail shutdown from over voltage or over current, most likely you have some bad lamps in the panel, you can open the panel up and take a 3 volt power source, like 2 AA batteries and test them one at a time, replace the ones that are bad or its easier to replace the entire strip..Good luck

Any more than 5 blinks are problems on the main board. It indicates a failure during P.O.S.T. (power on self test) This problem is a "fatal error" and cannot be reset, the board is indicating a fault on the board itself.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electronicshelponline.blogspot.com/
http://electro-medical.blogspot.com/
Blinking codes details of many popular brand TVs are given. Surf the site with patience.

LCD & LED TV Repair - No Image & Blank Black ... - YouTube

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All comments on LCD & LED TV Repair - No Image & Blank ...

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I have sound and picture but no backlight. .... how do you replace the back lighting on a led lg tv? ... I have a 42 inch LED LCD combo DVD TV made by RCA.

My LED TV has sound, but no picture. - Tom's Guide

www.tomsguide.com/answers/id-2771720/led-sound-picture.html

Dec 28, 2015 - Hi, I have an RCA 32" LED 1080p TV that is less than 2 years old, and it has already lost the video. I can hear sound, and I can see lights in the ...

53 HISENSE complaints and reviews @ Pixxed Consumer

hisense.pissedconsumer.com/

Below is picture of error code table of Sony TV KP-57WS500You can check what is error 5 and 6