My Sony KP-46WT500 screen shows the tv image in blue only for a few seconds, then it goes completely blank (as if it were off). Do I need to replace the bulbs?

Ur tv have a problem known as convergence problems.Ur tv convergence board must have it 2 STK convergence ICS and some or all it resistors to be replaced to solved convergencce problems.The shop will cost u $300-350 for parts and labors.

Convergence is dead.Must replaced 2 convergence ICS,and some or all it resistors.Can u do soldering electronics parts?Buy a convergence kit at websites Tv repair World.com,Tvrepairkits.com to repair it ur self.The shop will cost u $300 for parts and labors.

Hi,
Symptom shows that it is convergence out chips failure that causing misaligned images on screen. Please replace convergence out chips in tv to get converge picture.
Question shows it is Sony KP-46WT500, if it is different model let me know please.
I can provide you more technical assistance if you wish to repair tv by yourself.
Thanks.

Hi,
It would be great to assist you in Sony convergence issue.
As you said, for some time TV shows bad convergence in picture that shows its matter of lose/ dry solder joints in D board, specially on convergence out ICs pins that need to be re-solder.
There are 2 big black ICs mounted on aluminum heat sink on D Board of TV, below image shows D Board location in TV.
Resolder pins of these 2 ICs and also check any other dry/ cold solder joints in circuit board. I do not think of IC replacement as problem occurs some time.
Let me know if you have additional question.
Thanks.

You probably have a bad BLUE CRT. Due to the cost and the length of time it would take to repair, I would not invest the money into it. It would require a Qualified Service Person to come to your home and remove the BLUE CRT assembly and send it back to SONY to be rebuilt. Estimated cost would be around 800.00. I would check prices of a replacement set.
I hope this helps,
Skyassoc

When Sony TV gets problem it goes to standby as protection mode and LED start flashing.
Do you see standby light blinking?
There would be 3 seconds interval between blinks so count from pause to pause and let me know.
Thanks.

If TV shuts off after turn on Blue Tube could be bad.

you either need to reconverge the unit (auto focus) or you need to replace the converge chips-stk-xxx-xxx don't adjust anything.

blue crt shorting use crt restorer to lift short or replace picture tube /crt

inspect the neck boards on the picture tubes