Hp Ms7860 Ver 12 Motherboard Manual New -

Product Identification

• Model Name: MS7860
• Version: VER: 1.2
• Manufacturer: Hewlett-Packard (HP)
• Common Alias: This motherboard is the system board for the HP Compaq Pro 4300 All-in-One (AiO) PC.

• Front Panel (F_PANEL): Pins 3-4 (Power LED), 5-7 (Power SW), 2-4 (HDD LED) – Check manual for exact Ver 12 pinout.
• SATA Ports: SATA 0 (Primary HDD/SSD), SATA 1-3 (Optical drives/extra storage).
• Fan Headers: CPU_FAN (4-pin, PWM) and SYS_FAN (3-pin, DC).

Beep Codes (Post Error)

• 1 long, 2 short: Video error (GPU not seated or dead). Ver 12 note: The integrated HDMI port may die if a discrete GPU is installed without disabling iGPU in BIOS.
• 3 long, 2 short: Memory error (Try slot A2 first, then B2).
• Red LED blinking consistently: Power supply failure (HP uses a proprietary 12V standby rail on the 4-pin CPU connector).

• Supported: i7-4790 (3.6GHz), i5-4590, i5-4690, Xeon E3-1225 v3 (Yes, some versions support Xeon).
• Not Supported: 5th Gen Broadwell (Even though socket is LGA 1150, BIOS lacks microcode).
• TDP Limit: 84W max. Do not install an i7-4790K (88W TDP). The VRMs on Ver 12 are not heatsinked and will overheat.