H-ig41-uatx Rev 1.1 Schematic

Generic G41 reference designs (from Intel’s "Crestline" or "Eaglelake" documents) are helpful but insufficient. The H-IG41-UATX Rev 1.1 has specific OEM customizations:

The G41 chipset requires specific power-up order:

Look for the PWM IC (e.g., RT8802A or ISL6334). The schematic will show:

This is the busiest part of the schematic. The ICH7 handles:

No official manual will tell you that a cracked resistor at location R484 (as shown on page 14 of the rev 1.1 schematic) is why your RAM slot B is dead. Only the schematic provides that level of detail.

For anyone restoring a retro gaming PC (Windows XP era), repairing a legacy industrial PC, or learning motherboard repair, locating and properly reading the h-ig41-uatx rev 1.1 schematic transforms a pile of scrap silicon into a fixable, understandable system.

Next Steps:

Remember: Every trace, every passive component, and every logic gate on that board tells a story. The schematic is your guide to reading it.

Disclaimer: This article is for educational and repair purposes. Modifying hardware carries risk of permanent damage. Always discharge static properly and verify voltages with a multimeter.

The H-IG41-uATX Rev 1.1 (also known as the Eton motherboard) is a microATX board manufactured by Foxconn for HP and Compaq systems, such as the Compaq 500B Microtower. It is a budget-friendly LGA 775 platform designed for legacy office and home use. Core Specifications

Chipset: Intel G41 Express (Northbridge) with ICH7 (Southbridge).

Processor Support: Compatible with Intel Core 2 Quad, Core 2 Duo, Pentium Dual-Core, and Celeron processors.

Memory: Supports up to 4GB of DDR3 (1333/1066/800 MHz) across two slots. Some reports suggest the chipset can handle 8GB, but the board is officially rated for 4GB. h-ig41-uatx rev 1.1 schematic

Expansion: Includes 1x PCIe x16, 2x PCIe x1, and 1x legacy PCI slot. Review & Technical Insights

For repair and maintenance, the following details are essential:

Common Issues: A known failure point is the main Intel IC getting excessively hot, which often indicates a short or power delivery failure.

Repair Documentation: Official full electronics schematics are not publicly released by HP; however, a basic Maintenance and Service Guide provides part maps, LED error codes, and jumper settings for clearing CMOS. Troubleshooting:

Voltage Rails: Technicians typically look for 3V on the BIOS chip (Pin 1) and stable 1.8V lines for memory management.

BIOS: BIOS updates are specific to the HP/Compaq model it was pulled from (e.g., HP 500B). Finding the Schematic

Because this is an OEM board, finding a literal Rev 1.1 circuit diagram usually requires third-party archives:

Manuals & Layouts: Basic specifications and layout diagrams are available on Scribd.

Boardview/Schematic Files: Professional repair technicians often source these from specialized forums or repositories like The Retro Web or Telegram-based archives. H-Ig41-Uatx Manual - Facebook

While a full circuit-level schematic for the Foxconn H-IG41-uATX (Rev 1.1)

(often referred to by the code name Eton) is generally proprietary to HP and Foxconn, the following essential layout and pinout details are critical for troubleshooting or re-casing this motherboard. Core Specifications Overview

This micro-ATX board is typically found in HP Compaq 500B and 6000 Pro systems. Generic G41 reference designs (from Intel’s "Crestline" or

Socket: LGA 775 (Supports Intel Core 2 Quad, Core 2 Duo, Pentium Dual-Core). Chipset: Intel G41 Express.

Memory: 2x DDR3 DIMM slots (Supports up to 4GB or 8GB depending on specific sub-revision).

Expansion: 1x PCIe x16, 2x PCIe x1, 1x PCI, and 1x mini-PCIe (often used for wireless). Front Panel Connector Pinout (9-Pin Header)

The front panel header is a standard 9-pin (2x5) block typically located in the bottom right corner. Power led not working - HP Support Community - 7194218

The H-IG41-uATX Rev 1.1 schematic serves as a vital blueprint for repair technicians and hardware enthusiasts working with the "Eton" motherboard. Manufactured by Foxconn for HP and Compaq systems—notably the HP 500B and Compaq CQ3000 series—this Micro-ATX board is built around the legacy LGA 775 socket and Intel G41 Express chipset.

Understanding the schematic and layout is essential for troubleshooting common power-on failures, identifying blown components, or performing specific hardware upgrades. Core Technical Specifications

The H-IG41-uATX (Rev 1.1) is designed for stability in budget desktop environments. Key technical pillars include:

Processor Support: Compatible with Intel Core 2 Quad, Core 2 Duo, Pentium Dual-Core, and Celeron processors.

Memory Architecture: Features two 240-pin DDR3 DIMM slots. It officially supports up to 4GB of RAM (2x2GB) at 800/1066/1333 MHz speeds.

Chipset: The Intel G41 Northbridge and ICH7 Southbridge manage data flow between the CPU, memory, and peripherals.

Expansion Slots: Includes one PCIe x16 slot for dedicated graphics, two PCIe x1 slots, and one legacy PCI slot. Schematic Breakdown: Power and Signal Paths

When reviewing the H-IG41-uATX circuit diagram, technicians often focus on these critical areas: 1. Power Delivery (VRM) Remember: Every trace, every passive component, and every

The board utilizes a standard 24-pin ATX main power connector and a 4-pin +12V CPU power connector. The Voltage Regulator Module (VRM) around the LGA 775 socket is responsible for stepping down power for the processor. Failures in this area often manifest as a "no post" condition where fans spin but the system does not boot. 2. Front Panel Pinout

Connecting a non-HP case requires knowing the front panel header pinout. For the Rev 1.1 board, these pins control the power button, reset switch, and LED indicators.

Power Button: Typically located on the front panel header near the edge of the board.

USB Headers: Two internal USB 2.0 headers provide connections for front-case ports. 3. Storage and I/O Interfaces

The schematic reveals four SATA II (3Gb/s) ports for hard drives and optical drives. The rear I/O panel includes: Video: 1x VGA port (integrated Intel GMA x4500 graphics).

Connectivity: Realtek RTL8103EL 10/100 Ethernet and four USB 2.0 ports. Audio: Realtek ALC662 6-channel high-definition audio. Troubleshooting and Repair

Technicians searching for the schematic often use it to trace voltages across the board. For example, verifying the 3.3V, 5V, and 12V rails from the power supply to their respective regulators is a standard first step in diagnosing a "dead" board.

The board also features a Mini PCIe slot specifically for wireless cards and a clear CMOS jumper (often a button or bridge) to reset BIOS settings. Foxconn H-IG41-uATX (REV:1.0) - The Retro Web

Once you have the Rev 1.1 PDF, focus on these critical pages:

If you are a hobbyist or embedded engineer, the schematic unlocks modifications:

Since Foxconn does not publish it legally:

⚠️ Most online sources claiming to sell this exact schematic are scams. The closest public schematic is for Foxconn G41MXE/G41M-S – about 85% identical.