Controlled by a multi-phase PWM controller (e.g., ISL or RT series), converting 12V down to ~1.0V–1.3V. 1.5V / 1.5V_Dual: Feeds the DDR3 memory slots.
state whenever you press the physical chassis button. Trace this line back into the controller chip, which commands the power-supply turn-on pin ( PSON# ). If the VRM rail short-circuits, the main power supply unit will trip its internal over-current protection. You can identify this by measuring resistance to ground across the 12V input connector pins. hig41uatx rev 11 schematic
The motherboard, commonly known by its HP/Compaq codename "Eton" , is a vintage Micro-ATX board manufactured by Foxconn . Frequently found in office-oriented desktops like the HP Compaq 500B series , it remains a popular choice for budget-conscious retro builders and repair technicians. Controlled by a multi-phase PWM controller (e