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This maybe due to capacitors dried up in air conditioned room. Keep the TV in standby mode, will keep the large electrolytic capacitor cured at all times.
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without knowing age of unit, I suggest replacing the motor. Sounds like the armature is worn the bearings and is moving inside the windings of the motor. I would do that first before moving forward with any other repairs.
These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.
Tries pushes the power switch on the remote few times,each times push wait like a 1 mins or 2 mins for the tv Tuner signal board to take it effect.This process should get ur tv picture back,because the tv Tuner signal board it is old and having problems,evenually require replacement of a refurbish tv Tuner signal board.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv Tuner signal board for the replacement.
If you have OSD (on screen display) but no video or sound, you may have a problem with your video input switching or video processor. Either way this could require tracing the signal with an oscilloscope and could get expensive.
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