: Audio is present, but the screen is black or very dim, which may point to the board or the LED backlight circuit.
Servicing television chassis involves exposing yourself to hazardous live voltages on the primary side of the power supply board. Disconnect the main power cable before touching any component on the hot side, and always discharge the main capacitor before attempting logic or soldering repairs.
The power board should supply 12V and 5V to the main board.
If the TV is completely unresponsive, you must flash the raw binary ( .bin ) file directly to the chip. tp.ms3458.pc757 service manual
Because the TP.MS3458.PC757 lacks sophisticated storage like eMMC, its operational software is small enough to fit inside an 8-pin SPI Flash memory chip. Firmware corruption is the most common reason these boards fail to boot past the standby light.
eMMC (typically 4GB or 8GB) for the Android operating system and user data
Sites like Elektrotanya host PCB layout files and repair information specifically tailored for electronics technicians. : Audio is present, but the screen is
TP.MS3458.PC757 is a commonly used "all-in-one" 4K motherboard found in various TV brands like RCA, Bauhn, and Haier.
This document summarizes a clear, usable service manual for the TP.MS3458.PC757 mainboard (common in certain LCD/LED TV/monitor models). Use this as a template to create a full manual or as a guide for troubleshooting, repair, and maintenance.
The TP.MS3458.PC757 is a highly popular, cost-effective three-in-one smart TV motherboard manufactured by Mainstone (often utilized by brands like Skyworth, Changhong, Xiaomi, and various local OEM television brands). A "three-in-one" board integrates the power supply unit (PSU), LED backlight driver, and the main TV logic board into a single printed circuit board (PCB). The power board should supply 12V and 5V to the main board
For those comfortable with a soldering iron and multimeter, here are step-by-step guides for the most common repairs.
Solder the chip back onto the TP.MS3458.PC757 board carefully, ensuring correct orientation of Pin 1 (denoted by a dot on the chip and board silkscreen). 6. Panel Modifications (Reducing Backlight Current)
The is a popular, high-performance universal TV motherboard (main board) commonly used in $4K UHD LED televisions, particularly in brands like RCA, Bauhn, and other OEM manufacturers . It is known for its versatility in supporting various panel sizes and resolutions, often powering larger screens ranging from 45" to 65".
Wear an ESD wristband. Microprocessors like the MStar MSD3458 are highly sensitive to static shocks.