Tp.ms3458.pc757 Service Manual

Manual solution:
Measure P_ON pin (usually on connector CN1). Should go from 0V to 3.3V when pressing power. If not, main chip isn’t booting → check VDD_CORE (1.2V) and SPI flash continuity.

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Since this is an aftermarket "Universal Board" (common in Asia and South America), the "Service Manual" is often just a single sheet schematic. Manual solution: Measure P_ON pin (usually on connector

Manual solution:
Check LVDS connector pins against the schematic. Missing LVDS_VDD (3.3V or 5V) is common → trace back to a blown fuse (often marked F1 or FB1). tp.ms3458.pc757 service manual