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TV quits working, screen goes black and red light next to power green light flashes 4 quick flashes . After a second or two of no flashing,red light repeats "code" flash. We pull the power plug at the TV, and the TV may start and work fine, or it may run for as short a time as 15 seconds. The remote cannot be used during this time while red light is flashing. Just before the warranty was up we had to take this TV in because the screen had verticle lines but sound was ok. The so called "mother board was replaced.This new problem started after the 3 month warranty period was up. Is the flashing light a code that will assist in evaluating repair.

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Re: TV quits working, screen goes black and red light...

Here are some helpful tips you need to consider as follow
1.) Vertical line at the left of the picture
Replace L506 on A board, replacement part number 1-407-366-0
2.) White vertical line only displayed on tube
Check for dry joint or burnt track on Horizontal Yoke PCB socket or main board
3.) Vertical lines are not straight when picture is very bright or has white text content
Replace resistor 3420 in the beam current circuit (12k or 15k) replaced with an 18k

Please let me know any update.

Posted on Nov 27, 2007

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Re: TV quits working, screen goes black and red light...

The Sony diagnostic routine for 4 blinks indicates it to be a vertical deflection problem.

Did you see a solid horizontal line in the center of the screen prior to it going out? If so, that is a tell tale sign for vertical problems.

basic sony reset below

The STANDBY light will flash if the television detects an issue within the television. Some of these issues can be resolved simply by following the steps below to reset the television.

  1. Turn off the television. IMPORTANT: For a projection television that uses an internal lamp, wait 5 minutes after turning off the television to allow the lamp to cool before continuing with the following steps.
  2. Unplug the television power cord from the electrical outlet.
  3. Let the television remain without power for 60 seconds.
  4. Plug the power cord back into the electrical outlet. NOTE: If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.
  5. Turn on the television.

If the issue is still unresolved after following all of the troubleshooting steps, service may be required. Please note the number of times the STANDBY light flashes and relay that information to the service center

Posted on Nov 27, 2007

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(1) 4tinyhearts said:
I unplugged the TV and held the buttons down and it continued to flash. I continued to hold down the two buttons and replugged it in again and it worked. TV back up and working.

(2) lastditcheffort said:
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