Yoidesu B75M-I Motherboard User Manual

1. Product Overview

The Yoidesu B75M-I is a compact ITX motherboard designed for Intel Core 2nd and 3rd generation processors (LGA1155 socket). It supports DDR3 memory, features a Serial ATA M.2 interface for high-speed storage, and provides both VGA and HDMI outputs for high-definition displays. Its robust 4-layer PCB design and 3+1 phase power supply ensure stable and efficient operation for various computing tasks.

Figure 1: Top-down view of the Yoidesu B75M-I Motherboard, highlighting the CPU socket, memory slots, and various ports.

Key Features:

• CPU Compatibility: Supports Intel Core i7, i5, i3 2nd and 3rd generation processors with LGA1155 socket.
• Memory Support: Two DDR3 memory slots, supporting up to 16GB at 1066MHz, 1333MHz, and 1600MHz.
• Storage Interface: One Serial ATA 3.0 port, three Serial ATA 2.0 ports, and one M.2 (NGFF M.2) interface supporting AHCI protocol for data transfer speeds up to 6Gbps.
• Video Output: Integrated VGA and HDMI ports for high-definition video and sound output (up to 1080p).
• Power Design: 3+1 phase power supply for stable and efficient power delivery.
• Durability: Robust 4-layer PCB design and all solid-state capacitors for enhanced stability and longevity.
• Connectivity: Gigabit network card, 2x USB 3.0, 6x USB 2.0, plus internal USB 3.0 and USB 2.0 pins.

2. Setup and Installation

This section provides instructions for installing the necessary components onto your Yoidesu B75M-I motherboard. Ensure your system is powered off and unplugged before beginning any installation.

2.1 CPU Installation (LGA1155)

1. Locate the LGA1155 CPU socket on the motherboard.
2. Gently push down the load lever and pull it to the side to open the CPU socket cover.
3. Carefully align the CPU with the socket, matching the golden triangle on the CPU with the triangle mark on the socket. Ensure the notches on the CPU align with the keys in the socket.
4. Lower the CPU straight down into the socket without applying force. Do not force the CPU into place.
5. Close the socket cover and push the load lever back into its locked position.
6. Install the CPU cooler according to its manufacturer's instructions.

Figure 2: Close-up view of the LGA1155 CPU socket on the B75M-I motherboard, ready for CPU installation.

2.2 Memory (RAM) Installation

1. Locate the two DDR3 DIMM slots on the motherboard.
2. Open the clips at both ends of the memory slot.
3. Align the notch on the DDR3 memory module with the key in the DIMM slot.
4. Insert the memory module firmly into the slot until the clips snap into place, securing the module.

2.3 M.2 SSD Installation

1. Locate the M.2 slot on the motherboard.
2. Remove the M.2 standoff screw from the motherboard.
3. Insert the M.2 SSD into the slot at a 30-degree angle, ensuring the gold contacts are fully seated.
4. Gently push down the M.2 SSD and secure it with the standoff screw.

Figure 3: The Serial ATA M.2 interface on the B75M-I motherboard, designed for high-speed storage.

2.4 Graphics Card Installation (PCIe 3.0 x16)

1. Locate the PCI Express 3.0 x16 slot.
2. Remove the corresponding expansion slot cover from your PC case.
3. Align the graphics card with the PCIe slot and press down firmly until it is fully seated and the retention clip locks into place.
4. Secure the graphics card to the case with a screw.

2.5 Power Supply Connections

• Connect the 24-pin ATX power connector from your power supply unit (PSU) to the main 24-pin power socket on the motherboard.
• Connect the 4-pin ATX 12V power connector from your PSU to the 4-pin power socket near the CPU.

Figure 4: The B75M-I motherboard's power delivery system, featuring a 3+1 phase design for stable operation.

2.6 Storage and Peripheral Connections

• Connect your SATA hard drives or SSDs to the Serial ATA 3.0 (1 port) or Serial ATA 2.0 (3 ports) connectors using SATA data cables.
• Connect the front panel USB ports, audio jacks, power button, reset button, and LED indicators to the corresponding headers on the motherboard. Refer to your PC case manual for specific pin assignments.
• Connect external peripherals such as keyboard, mouse, and monitor to the rear I/O panel ports (USB, VGA, HDMI, LAN, Audio).

Figure 5: Rear I/O panel of the B75M-I motherboard, featuring VGA and HDMI ports for display connectivity.

3. Operating Instructions

Once all components are installed and connected, you can power on your system.

3.1 First Boot

1. Ensure all power cables are securely connected and the monitor is plugged in.
2. Press the power button on your PC case.
3. The system should power on, and you should see a display on your monitor.
4. If no display appears, refer to the Troubleshooting section.

3.2 BIOS/UEFI Setup

The BIOS (Basic Input/Output System) or UEFI (Unified Extensible Firmware Interface) is firmware that initializes hardware during the booting process and provides runtime services for operating systems. To enter the BIOS/UEFI setup utility:

• During the initial boot sequence, repeatedly press the DEL key (or F2, F10, depending on the specific BIOS version) to enter the setup utility.
• Within the BIOS/UEFI, you can configure various system settings, including boot order, date/time, CPU settings, memory timings, and peripheral options.
• Save any changes before exiting the BIOS/UEFI.

3.3 Operating System Installation

After configuring the BIOS/UEFI, you can proceed with installing your preferred operating system (e.g., Windows, Linux) from a bootable USB drive or DVD. Ensure the boot order in BIOS is set to prioritize your installation media.

4. Maintenance

Proper maintenance ensures the longevity and stable performance of your motherboard.

• Dust Removal: Regularly clean dust from the motherboard and components using compressed air. Ensure the system is powered off and unplugged before cleaning.
• BIOS Updates: Periodically check the Yoidesu support website for BIOS updates. BIOS updates can improve system stability, compatibility, and performance. Follow the update instructions carefully to avoid damaging the motherboard.
• Component Checks: Ensure all cables and components are securely seated. Loose connections can lead to system instability.
• Environmental Control: Operate the motherboard in a well-ventilated area with stable temperature and humidity to prevent overheating and component degradation.

5. Troubleshooting

This section addresses common issues you might encounter with your motherboard.

5.1 No Power / System Does Not Turn On

• Check if the power supply unit (PSU) is properly connected to the motherboard (24-pin and 4-pin connectors).
• Ensure the PSU is switched on and the power cable is securely plugged into both the PSU and the wall outlet.
• Verify that the front panel power button cable is correctly connected to the motherboard's front panel header.
• Test the PSU with another system or use a PSU tester if available.

5.2 No Display on Monitor

• Ensure the monitor is powered on and the video cable (VGA or HDMI) is securely connected to both the monitor and the motherboard's I/O panel (or discrete graphics card).
• If using a discrete graphics card, ensure it is properly seated in the PCIe slot and any necessary auxiliary power cables are connected.
• Reseat the memory modules. Incorrectly seated RAM is a common cause of no display.
• Try booting with only one memory module installed.
• Clear the CMOS (Complementary Metal-Oxide-Semiconductor) by removing the small coin-cell battery (CR2032) from the motherboard for a few minutes, then reinserting it. Ensure the system is unplugged before doing this.

5.3 System Instability / Random Crashes

• Check for overheating. Ensure CPU cooler is properly installed and fans are spinning. Monitor temperatures using software.
• Run memory diagnostic tools to check for faulty RAM modules.
• Ensure all drivers (chipset, graphics, etc.) are up to date.
• Verify that the power supply is sufficient for all installed components.

6. Specifications

Detailed technical specifications for the Yoidesu B75M-I Motherboard.

Figure 6: Dimensions of the B75M-I Mini-ITX motherboard, measuring 170mm x 170mm.

7. Warranty and Support

For warranty information and technical support, please refer to the official Yoidesu website or contact your retailer. Keep your proof of purchase for warranty claims.

Manufacturer: Yoidesu

Date First Available: May 13, 2025