B250B4 Desktop Computer M ATX Motherboard Dual Channel DDR4 Memory M.2 Interface PCI E X16 Gen 3.0 Slot Motherboard Item Type: Desktop Computer Motherboard Material: PCB Model: B250B4 Motherboard Size: Approx. 190x170mm / 7.48x6.69in Motherboard Architecture: M ATX CPU Slot Type: Support for LGA 1151 (for 6 7 8 9 Generation Core i3 i5 i7 and for Celeron, for Pentium Processors) Network Card: Gigabit Network Card Graphics Card Slot: PCI E X16 Gen 3.0 Support Memory Type: 2 x DDR4 Maximum Memory Capacity: 16GB x 2 (32GB) Sata Interface: SATA3.0 x 3 USB Interface: USB3.0 x 2, USB2.0 x 4, Front USB2.0 Pins x 1, Front USB3.0 Pins x 1 Power Interface: 24 + 4 Pin Six Phase Power Supply Expansion Interface: HD Multimedia Interface x 1, VGA x 1, M.2 Interface (Support NGFF, NVME Protocol) Battery Type: CR2032 Button Cell (Built In) Battery Capacity: 240mA Fix the motherboard in the main case, and then connect the connectors according to the corresponding marks. No power on problem: When the device won't power on and the power indicator doesn't light up, make sure the power supply is connected and working properly. If your CPU fan is installed correctly, you can also determine whether the power supply is working properly by judging whether the fan can work properly. 1. Confirm the power supply of the power adapter a. Please check the connection of the power cord and whether the socket is plugged in as shown in the figure below. If there is a main power switch on the extension cord, please make sure it is on state. b. Replacing the extension cord and socket will help solve the problem. Verify that the motherboard power supply is properly connected: 1. Verify that the power adapter's power cord is properly plugged into the ATX power connector. The motherboard may contain 24 pin EATXPWR and 8 pin EATX12V, make sure that both 8 pin EATX12V and 24 pin EATXPWR are connected to the power adapter. The location and number of power connectors may vary from model to model, some motherboards may contain 24 pin EATXPWR and 4 pin EATX12V, both connectors should be linked to the power adapter Does not power on: When the fan and Q LED indicator Q CODE do not respond when the power button is pressed to start the computer, please follow the instructions below to troubleshoot the problem 1. Follow the troubleshooting steps above to confirm that the power adapter is properly plugged into the ATX power connector on the motherboard. 2. Keep the CPU, CPU radiator fan and a separate RAM video memory on the motherboard. Remove all USB devices and external cards from the motherboard, including mouse, keyboard, card reader, flash drive, external hard drive, external PCI E card, etc. Remove all cables from the motherboard, including network cables, sound cables, and display cables (HD Multimedia Interface, VGA, DVI, DP). Then try to turn on the computer, if it can boot normally maybe the problem is the removal of external devices. Reconnect the external devices one by one until you determine which external device or wire is causing the problem. 3. Attempt to clear CMOS.