Usually labeled as "USB Service" or "USB Debug". Do not use a random USB port.
Technicians often use the schematic to address specific board failures: Standby/No Indicator Faults
before inserting the USB drive.
Supports backlight voltages between 45V and 94V , suitable for single backlight outputs.
The Main CPU is not booting. Schematic Trace:
Ensure no other files are present on the drive before copying the firmware.
Standby LED on TV lights up (red), but pressing power-on does nothing (no blue LED).
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