: This is the UL File Number for TMT (Trend Microtech) , a common PCB manufacturer for ASUS.
Find the front panel header pin labeled PW_SW (Power Switch) on the schematic layout. Verify that shorting this pin to ground pulls the corresponding pin on the Super I/O controller low, which triggers the power supply to turn fully on. ya4a194v0 motherboard schematic top
All at once.
[Raw 19V / 12V DC Input] ──> [3.3V / 5V Standby Rails] ──> [RAM Power Rail] ──> [VCC_CORE / CPU Power] 1. Checking the Main DC Input Rail (19V / 12V) : This is the UL File Number for