A number of possible reasons--from brightness/contrast set too high to a issue with the power supply of the set--a expert would have to examine the set--you might want to call Sony to see if known issue with this model.
I did have my contrast set pretty high but it still flickers even at a lower setting.
Power supply was replaced not even a month ago, referb from ebay. Optic engine was replaced from a different set out of the same model, no issues with that. I'm thinking it may be with the control board or the one that controls the LCD's, The lamp itself is not flickering, I confirmed that today.
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SOURCE: Sony KDS-50A2000 - bulb replaced but picture still yellow
Hi,It sounds like a light engine problem Sony is having.Basically the light of the lamp goes through tunnels that have mirrors that direct the lamp to 3 main LCD chips,These 3 LCD chips are blue,green, and red they blend to create the image and colors.When they start to fail you'll get color discoloration like what you are getting.You will need to replace the optical block because unfortunately they don't sell the LCD chips by themselves.GOD BLESS YOU!
SOURCE: blue haze and dull yellow patches on screen
The light engine in your set has gone belly up. It is a very expensive repair. Good news is that on a whole bunch of models like yours Sony has extended the waranty on the light engine. Check with a local authorized Sony service center and give them the model & serial number and you might get a free ride. If I were a betting man I'd take odds on 'you're in luck'. LOL
SOURCE: XL 5200 bulb replace and NO Picture or Sound
3 times blink error code shows Lamp Door is not seated / fixed properly, please recheck it and make sure that door close safety switch is pressed as this switch sends error signal to system control chip.
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