When you push the power button, the schematic illustrates a chain reaction of signals that must happen sequentially for the board to turn on:
One 24-pin ATX main power and one 4-pin CPU power (P4) connector.
The Rev 1.1 often uses a multi-phase VRM circuit to provide stable voltage to the Core 2 Quad processors. Key components include MOSFETs (often high-side and low-side), driver ICs, and electrolytic capacitors, which are common failure points in older systems. 3.3 Northbridge and Southbridge
Micro-ATX (uATX), specifically tailored for small form factor and desktop OEM towers.
The late LGA 775 era was plagued by the tail-end of the "capacitor plague." Look closely at the capacitors surrounding the CPU socket and the RAM slots. h-ig41-uatx rev 1.1 schematic
The Foxconn H-IG41-UATX Rev 1.1 is an LGA 775 motherboard widely deployed in OEM desktop computers, most notably by Hewlett-Packard (HP) under the alias "Eton." Component-level repair technicians, electronics hobbyists, and vintage hardware restorers frequently seek out the official schematic diagrams for this board to diagnose power delivery failures, trace faulty signal lines, and replace burned surface-mount components.
: The Southbridge releases the master reset lock after verifying voltages are stable.
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For technicians, DIY enthusiasts, and vintage PC restorers, the (often identified by part number 582679-001) represents a stalwart of the Intel LGA 775 era. Frequently found in HP 500B Microtower systems, this board is a reliable workhorse, but its age means that troubleshooting, component-level repair, and locating the H-IG41-uATX rev 1.1 schematic are essential for keeping these systems running. When you push the power button, the schematic
Before diving into the architecture, it is important to address the central challenge regarding this motherboard. Unlike retail boards, the was manufactured by Foxconn exclusively for HP as an OEM (Original Equipment Manufacturer) part . Consequently, HP has not publicly released the full circuit schematics for this board.
: Move jumper to pins 1-2 for ~10 seconds, then return to 2-3. Memory & CPU Support
Usually an ITE or Fintek chip on this board, it monitors system temperatures, controls fan speeds, and manages legacy ports (like PS/2 or serial ports if present). It is also highly involved in the initial power-on sequence. Key Sections of the H-IG41-uATX Schematic
2 x 240-pin DDR3 DIMM slots. Supports dual-channel DDR3 non-ECC unbuffered memory at speeds of 1066/800 MHz, maxing out typically at 4GB or 8GB depending on OEM BIOS configurations. : The Southbridge releases the master reset lock
Intel G41 Express Northbridge (GMCH) + Intel ICH7 Southbridge (ICH).
Look for the front panel connector JFP1 in the schematic to check if the power button signal is reaching the motherboard. B. Board Turns On But No Display (No POST)
To take your repair to the next level, try to source the companion alongside your PDF schematic. While the schematic shows you how components connect logically, the boardview file shows you exactly where those microscopic traces and components reside physically on the physical PCB layers.
A frequently overlooked but vital section of the H-IG41-UATX schematic is the Super I/O (SIO) chip. This component handles the "housekeeping" tasks of the motherboard: monitoring fan speeds, temperature sensors, and voltage levels. The schematic details the connections between the SIO and the PS/2 keyboard/mouse ports, as well as the serial port header.
The is a motherboard born from a collaboration between Foxconn and HP , designed to power many of the company's mainstream and business desktop PCs from the late 2000s and early 2010s. Commonly found inside systems like the HP 500B Microtower or the Compaq Presario CQ3000 series , this board represents a significant transition era in computing. Understanding its technical nuances, especially its schematic, is crucial for repair shops, hobbyists, and technicians looking to diagnose faults, upgrade CPUs, or modify this legacy hardware.
Intel G41 Express (Northbridge) + Intel ICH7 (Southbridge / ICH).