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Please my Sony Bravia LCD blinks 4 times red when I try to turn it on

Hamza Mabrouk Benterki  KDL-55 is not a complete model number. We really cannot answer without having at least that information. Commonly on Sony KDL a 4 blink error code is a Balancer error (main board). A 4 blink code can also mean that either the backlight inverter board is bad or one of the backlights in the LCD panel has failed. It can also be the LD board or main logic board