ITEM NAME:DDR4 Test Card RAM Memory Slot Out Motherboard Repair Desktop Analyzer Tester DDR4 testing CARDS to fully support the , all DDR4 interface board, using leds to indicate that the data line address line open circuit and short circuit, used to repair is not switched on, don't display, don't read failure such as motherboard, memory is an essential tool for repair computer motherboard Instructions: Equipped with battery (CR2032, 3V) insert battery to the test card and insert in the corresponding type motherboard, and then insert the CPU motherboard, presses the button switch, test card can judge motherboard memory part of open circuit, short circuit fault If a lamp is not bright, would check of memory and CPU holder or with short circuit, memory slot is damaged Like a light, bright, should check whether the signal and power supply circuit Note: 1. DDR4 test card in the test, the motherboard must plug in CPU, test the lamp will be bright, because the memory part of the signal is connected to the CPU. 2. After using several times, test the lights dimmed, the reason was that the test lamp battery voltage is not enough, please users to replace the battery 3. The signal of the tester, because each motherboard design of producers and chipset is different, some signals may show different, please use the same motherboard for troubleshooting Specifications: Application: Desktop Type: Logic ICs Quantity: 1 Pc (1 pc of DDR4 Test Card only,other accessories demo in the picture are not included!) Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you.Quantity: 1 Pc (1 pc of DDR4 Test Card only,other accessories demo in the picture are not included!). 1 x DDR4 Test Card. Application: Desktop. Also note that monitor settings may vary from computer to computer and may distort actual colors.