Android TV (typically versions 4.4 up to 7.0, depending on the TV brand customization)
Often labeled (e.g., 1117 series) regulating voltage down to 1.2V, 1.8V, or 3.3V. 6. Tips for Repair
Usually a failure in the AC-DC power conversion section, such as the switching MOSFET or PWM IC. 4. How to Repair the TP.MS3458.PC757 Board Step 1: Safety Precautions
TP.MS3458.PC757 is a commonly used main board (also known as a triple board because it combines the power supply, LED driver, and TV mainboard) found in various 4K UHD television brands, including TV Parts Today Service Manuals and Technical Resources tp.ms3458.pc757 service manual
If the voltage spikes high (over 100V) and then drops down to the 12V rail, the driver is working, but the LED strips inside the panel are broken/open circuit.
Clear images of both the top and bottom sides of the board.
Replacing this board often resolves over 85% of standard TV failure issues, such as power surges or signal processing errors. TP MS3458 PC757 T MS3458 U801 Android TV (typically versions 4
A: Mostly yes. The power and video sections are identical. The main difference is the NAND flash type and USB hub layout.
Since this is a combo board, failures are often categorized into three sections:
If the TV is completely dead or stuck in standby (red light only), you must open the chassis and probe the mainboard test points using a digital multimeter set to DC voltage. Replacing this board often resolves over 85% of
Turn on the main AC power switch while continuing to hold the power button.
Powers the SPI Flash Memory chip (Winbond or Gigadevice). 3. Backlight Power Driver Circuit
Check the boost MOSFET, the freewheeling diode, and the electrolytic output filter capacitors.