When the power button is clicked, the noise beeps like it is turning on and then followed by a high pitched screech and then it will turn off shortly after. the tv shows nothing other than a trouble shoot page and occasionally nothing, I've tried, plugging and unplugging, factory resets and nothing works
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ok so, i hate being the one to admit this… but this happened to me before, but i caused it. Does the sound (sound) like its coming from where the fan is? Like maybe a mechanical screech? If so, its the fan hitting something inside. What i had to do was remove the casing (dont do this unless youre ok with voiding your warranty) and kind of bend the metal around it back into its original position.
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Your vents might need cleaning. You can use a Compressed Air Canister, or just a simple vacuum. That fixed close to the same issue on one of my Xbox 360s.
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