Use a USB-to-TTL adapter (3.3V). Connect to TX/RX/GND on the main board. Use Putty at 115200 baud to interrupt boot and flash via XMODEM.
Short on the 24V rail driving the panel’s timing controller. Disconnect the T-Con board; if relay stops clicking, the T-Con or panel is shorted. Part 4: LED/LCD Backlight Repair (Most Common Fault) 90% of “no picture, sound OK” issues are failed backlight strips. v7 0 smart oled/led/lcd tv repair tips pdf free download
| Brand | Search string | |-------|----------------| | TCL | TCL V7.0 service manual PDF | | Hisense | Hisense H7 series chassis V700 schematic | | Philips | Philips TPM17.1E V7.0 repair tips | | Vestel | Vestel 17MB95 V7.0 TV service manual | | Generic | MSD309 V7.0 main board circuit diagram | Tip #22 – Use a TV repair dongle (LVDS pattern generator): Costs $30. Bypasses the main board to test panel and backlight independently. Use a USB-to-TTL adapter (3