I have a problem with the TV going to standby on its own. This gets worse later in the day so it may be an overheating problem. At its worst point the screen goes red before the set goes to standby. It can always be switched on again from the remote. Can anyone help with this problem
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It sounds that there is some short circuit with its SCL-SDA rail, at its main digital circuit board. It will be best to contact any service technician, as troubleshooting the main board is a skilled work.
These tv is famous for high voltage it dead or cold solders to it FBT.The flyback transformer,a big black block of plastic with a red wire with a cap hook to the CRT(tv tube).U know how to solders? Take the tv aparts resolders the FBT.Or tries press the power button on/off couples times,if u get a picture.Don't touch it let it on,for three or four hours.Let the heat from the electricity to Amp up the heat,might solved this problems,without resoldering.
tv goes into standby all the time if a power supply is not fine, what happens is that a power supply produces two voltages, one small one powers a standby components and bigger voltage powers a line transformer which later produces more small voltages,
then later cancels the first small voltage.
chec your power supply semi conductors like, transistors, diodes and small value resistors, on your power supply. some power supply uses a IC to oscillate a ht. so check a supply at a w/shop.
All symptoms in your TV shows that you need to replace its Lamp as it has been consumed its life hours and TV requires new lamp. Lamp can be obtained from Sony Website. Price is $200, Hope this info will help you to enjoy your Sony TV in coming days.
Try replacing the electrolytic capacitors in the power supply section.
I started with replacing (2) 860uf 180v caps just after the bridge
rectifier and continued along the circuit. Some (15) or so capacitors
later,it finally cleared the the horizontal bars and lines and the high
pitched noise. It also fixed another intermediate problem of no video,
when turning on the power.
Here is a picture of what they look like:
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The power compensator IC is bad along with most likley the main board. This is going to be an expensive repair. If the warranty expired in January, and you were in touch with them about then and they did nothing, you should try to fight with them. They may send out a repair person to get your set working again. Another possibility would be, if you have homew owners insurance and a tech can say that the problem was due to a power surge, the insurance will take care of part of the repair bill. Good Luck