Wait for the flashing to stop. The TV will automatically reboot into the initialization wizard once completed. Do not disturb the power during this process. ISP / Hardware Programming (For Hard Bricks)
Rapidly type the sequence: (Alternative codes: Menu + 1147 or Source + 3138 ). The factory setup overlay will appear on the screen. Critical Service Adjustments:
The is a highly popular, budget-friendly three-in-one smart TV mainboard. It combines the power supply, LED backlight driver, and TV motherboard onto a single printed circuit board (PCB). Manufactured by BoardTech (frequently used by brands like Skyworth, Changhong, Xiaomi, and various local assembly brands), this board is a staple in 32-inch to 43-inch LED TVs.
If voltages are stable, the issue is likely software-based. Force-flash the firmware via USB or reprogram the eMMC/SPI Flash using an RT809H or ISP programmer. 3. Sound Present, No Picture (Backlight Failure)
The TV appears completely dead with no standby light. tp.ms3458.pc757 service manual
Copy the official firmware binary file (usually named allupgrade_3458...bin ) directly to the root directory of the USB drive. Turn off the physical power switch of the TV. Insert the USB drive into the port. Press and hold the physical Power Button on the TV cabinet.
: The TV fails to turn on, often indicating a fault in the integrated power supply section of the board.
Press and on the TV for 5–10 seconds while plugging it back into power.
If your TP.MS3458.PC757 board is boot-looping (stuck on the Android logo) or has a solid standby light with no action, rewriting the software is required. Method A: USB Upgrade (Blind Flash) Use this if the bootloader of the TV is still intact. Wait for the flashing to stop
Supports both single and dual-channel 8-bit/10-bit FHD (1920x1080) and HD (1366x768) resolutions. Voltage Distribution and Test Points
RCA TP.MS3458.PC757 PCB-Layout ( PCB layout and service information). Scribd: TP-ms3458.Pc757 PCB Layout YoReparo: Service Manual 5. Summary Table for Quick Diagnosis Test Point Normal Value
Supplies power to the MStar processor core. Missing core voltage results in a completely unresponsive TV (no standby light). +1.5V DDR Power: Powers the DDR3 RAM chips. 3. Common Faults and Step-by-Step Troubleshooting Fault 1: Dead TV, No Standby LED Indicator
If blown, check the bridge rectifier diodes and the primary switching MOSFET for shorts. ISP / Hardware Programming (For Hard Bricks) Rapidly
There is no single "universal" service manual for this board, but you can find specific layouts and schematics based on the TV brand: PCB Layout (RCA):
Turn off the TV power completely (unplug from the wall outlet). Insert the USB flash drive into the TV's USB 1 port.
This comprehensive technical guide serves as an unofficial service manual repository, covering board specifications, common failure points, diagnostic voltage checks, firmware flash protocols, and service menu adjustments. Hardware Specifications Overview
: A service manual like this typically includes detailed information such as: