Sony Bravia KDL-40R450B LED Flash Sequence: 6 Times, TV Shuts Off, Green to Red

TV as in the subject, trying to start - the backlight turns on, the Sony logo appears, the tv turns off - and so 3 times. After 3 unsuccessful approaches, the LED changes from green to red and flashes 6 times. Optically, it's all right, slightly discolored laminate in the area of the backlight connector and under the power supply - I do not know what to cling to because of the lack of documentation. Somewhere, I found an algorithm that indicated the need to check the backlight first - I do not want to brush the matrix without a need. Do you suggest anything sensible?

It probably is not better.

KLV-32R412B KDL-32R430B KLV-40R472B KDL-40RM10B KLV-48R472B
KLV-32R422B KDL-32R433B KLV-40R482B KDL-48R470B
KLV-32R426B KDL-32R435B KDL-40R450B KDL-48R473B
KLV-32R482B KDL-32RM5B KDL-40R453B KDL-48R475B
KDL-32R410B KDL-40R455B KDL-48R480B KDL-32R413B KDL-40R470B KDL-48R485B
KDL-32R415B KDL-40R473B KDL-32R420B KDL-40R475B
KDL-32R423B KDL-40R477B KDL-32R424B KDL-40R478B
KDL-32R425B KDL-40R480B KDL-32R427B KDL-40R483B KDL-32R428B

For posterity, the driver's current control system detects dense backlight diodes - in this case two, in two branches - he samples. Replacing the thong for efficient and so much that it would be repaired. When repairing, pay special attention to the poor quality of the flex tape - because its hypotension in some connector, causes a new fault - the lack of content and a 5-time flashing of the red diode.