This often indicates a failure in the secondary voltage rails (5V, 12V) or corrupted eMMC firmware. Test the output diodes on the secondary side of the transformer.
: Test the LED+ output. If voltage is present but the screen is dark, the LED strips inside the panel may be open. If voltage is 0V, the onboard LED driver circuit is likely defective. tp.ms3458.pc757 service manual
If the TV fails to power on, displays dim video, or shuts down quickly, the combo board is often at fault. This often indicates a failure in the secondary
The TP.MS3458.PC757 is a 4K UHD smart TV motherboard utilized in various models, with full service manuals, schematics, and PCB layouts available through technical documentation sites. The board, common in 37-65 inch LED TVs, often requires troubleshooting for standby issues, constant restarting, and specific voltage, input, and panel configuration settings. For the complete service manual and schematics, download the documentation from Elektrotanya . If voltage is present but the screen is
Understanding the code helps in sourcing the correct service manual: