, universally known by its HP OEM codename , is a MicroATX system board manufactured by MSI. It acts as the backbone for high-end legacy desktop builds, notably featured within the HP Envy 700 series.

is built on the , supporting 4th generation "Haswell" processors. Socket : LGA 1150 Memory : 4 DDR3 DIMM slots.

Intel Z87 chipset with an LGA 1150 socket. Memory: 4 DIMM slots supporting up to 32GB of RAM.

Install 4 × 8GB DDR3-1600MHz DIMMs to reach 32GB, which is still capable for modern multitasking.

The header uses a standard 9-pin layout (matrix of 2x5 pins with one missing corner key pin):

HDD Activity LED (Hard Drive indicator light)

pins must be oriented correctly; if they fail to light up, reverse the connector. Power Supply (PSU) : Uses a standard 24-pin ATX

Enter BIOS settings and ensure "Onboard Graphics" is set to Auto or Disabled, and that PCIe security settings allow expansion cards.

This comprehensive manual guide bridges that gap. It provides the exact layout, pin configurations, hardware specifications, and step-by-step upgrade instructions required to service or recase the MS-7826 Ver 1.0 motherboard. Technical Specifications Overview

HP typically releases BIOS updates under the section for your specific computer model. The update utility is designed to run on Windows 8.1, and attempting to run it on Windows 10 carries a risk of failure [19†L41-L44]. You can usually identify the correct update via the motherboard’s System Board ID (e.g., SSID: 2AF3). Many community members have shared that they have successfully updated their boards using this method [4†L17-L21][17†L14-L16].