Was watching the TV and it shut off. Not audio and no screen after that. Red LED blinks 8 times.

You need a service engineer

SOLVED: blinks the red light 10 times frequently - Sony Bravia ...

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Apr 24, 2018 - @hdcifix215 10 blinks apparently is not a real error code from Sony. The descriptor for that is "Watch Dog Timer used to track micro processors, ... 2 answers
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Sony Bravia TV kdl- red blinking led light error codes ...

? 10:28
https://www.youtube.com/watch?v=0KGysXbxnaU
Mar 28, 2015 - Uploaded by Tampatec
Sony Bravia LCD TV KDL models red blinking led light error codes & possible ... with perfect picture, no warning signs and it just shuts off. is it that quick? ... with the following problem: I connect the power grid lights Standby red light. ... the title before deleting, it is very fast after that flashes Standby 6 times.Missing: 46w3000 ‎30

Not sure what code since you didn't say, but here is the code breakdown.

When the TV does this, the RED LED on the front will blink. For digits 1-10 it will blink pause then repeat. For numbers with 2 digits it will blink the first digit slow and then second digit fast. So 25 would be 2 slow blinks followed by 5 fast blinks.
Error Description Error/Prot Detected by Device Defective module Result
1 I2C1
2 I2C2
3 I2C3
4 I2C4
5 VIPER
6 5V supply
7 8V6 supply
8 1.2V DC/DC
11 3.3V DC/DC
12 12V supply
14 Supply Class D amplifiers
14 Supply Audio part SSB
17 MPIF1 audio supply
18 MPIF1 ref freq
25 Supply fault
27 Phoenix
28 MOP
29 AVIP1
31 AVIP2
32 MPIF1
34 Tuner1
37 Channel decoder
39 POD Interface
43 Hi Rate Front End
44 Main NVM
45 Columbus
53 VIPER
63 PDP Display

The 8 blinks is pointing to a bad flyback transformer and may be common with this set. (We have one too.)


High voltage error -- blinks 8 times • T8005 is faulty. (D board)

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3 blinks is the error code for the convergence ICs. You need to replace both STK392-110 convergence ICs. You can get replacement ICs at the following link and they provide installation instructions with pictures.
http://servicemanuals.vstore.ca/

Check your CRT boards on the end of the tubes for burn spots, and burnt components, check the resistors to make sure they are not shorted, burnt, and they read the correct resistance. Check the diodes to make sure they conduct in one direction only and are not shorted or open.

It is the safety switch

Replace HV block when self-diagnostic LED blinks 8 times =
Sony part # 8-598-955-32....if that doesn't cure it, the red CRT
would be next..................T.