: Located near the bottom right, containing pins for the power button, reset switch, and HDD/Power LEDs.
DDR3 power rail via the schematic. Dust or oxidized pins inside the DDR3 DIMM slots are also common; a quick clean with isopropyl alcohol and a re-seat usually resolves memory-related beep codes. Sourcing the Schematic hig41uatx rev 11 schematic
: 1.5V (Standard DDR3 specification). If this rail drops below 1.4V, the system will trigger a rapid beep sequence or continuous looping. Chipset Rails ( +1.25V_VCC & +1.05V_ICH ) : Located near the bottom right, containing pins