Hig41uatx Rev 11 Schematic — Real & Quick
Use a digital multimeter to measure the direct voltage across the output filter capacitors nestled around the processor socket. If Vcore measures
The Foxconn HIG41UATX (often branded under Lenovo or Acer OEM machines) is a classic LGA 775 motherboard built on the Intel G41 chipset. If you are a board-level repair technician or an electronics enthusiast trying to revive a legacy system, having and understanding the is your roadmap to success.
: Probe the source pins of the regulating MOSFETs flanking the DIMM slots.
The Southbridge issues PLTRST# (Platform Reset) to the Northbridge, which subsequently releases CPURST# to the CPU. The CPU then begins executing code from the SPI Flash BIOS chip. 4. Common Failure Points on the HIG41UATX Board
A common check is testing the BIOS chip. As noted by some users, check pin 8 for standard 3.3V power (note: some schematics show 1.8v or 3v depending on the exact chip revision). Standby Voltages: Check for 5Vsb5 cap V sub s b end-sub on the Southbridge and Power button connector. 3.2 Troubleshooting Steps
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1 x PCIe x16 slot, 1 x PCIe x1 slot, and 2 x legacy PCI slots.
Unstable operation under load, spontaneous reboots, or a complete failure to generate VCC_CORE .
Verify that the 32.768 kHz crystal oscillator near the Southbridge is cycling. This clock keeps system time and manages low-power wake states.
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.
The CPU power section lowers the +12V input from the 4-pin ATX12V connector down to the core voltage required by the LGA 775 CPU (VCC_CORE, usually between 0.85V and 1.3625V). Use a digital multimeter to measure the direct
Input is fed via a standard 24-pin ATX power connector, coupled alongside a dedicated 4-pin ATX_12V auxiliary line reserved specifically for the processor.
Based on your work to find this article, you are already on the right track. The most effective way to find this fragmented information is to use targeted search strings like the following, ideally in popular hardware forums:
Supplies 3.3V, 5V, and 12V to the board.
which cover CMOS clearing, password settings, and board layouts. Schematic Inquiries
I cannot produce a physical paper copy, as I am an AI text model with no printing or physical output capability. : Probe the source pins of the regulating
Switch a digital multimeter to continuity mode. Probe across the standard 4-pin CPU ATX 12V input connector. If a short-to-ground is found, use the schematic to isolate the high-side and low-side switching N-channel MOSFETs within the CPU VRM buck phases. Desolder and replace any shorted silicon gates. 5. Clock Generation and Timing Circuits
Here is a curated list of reliable sources for the specific files you might need for your Rev 1.1 board:
The power supply instantly trips its over-current protection (OCP) and shuts down when trying to boot.
Once the main power supplies are up, the PWM controllers and chipsets must release their respective PWRGD signals. Look for CPU_PWRGD and PLTRST# (Platform Reset) on your schematic. If PLTRST# stays low, the motherboard will never initialize the CPU. 5. Tips for Locating the Official Schematic File
