Feature: 1. Indicates Open and Short Circuit: Our tester card can indicate open and short circuits for repairing unbooted motherboards, and is used to repair motherboard failures such as no boot, no display, no memory read, etc. It is an essential tool for repairing computer motherboards. 2. Easy to Use: This test board is very easy to use, just follow the normal operation process to operate successfully, even a novice can do easy testing with the right guidance. 3. No External Power Supply Required: This RAM memory slot tester is available without external power supply, which makes your work process easy. 4. LED Light: Our test card comes with LED light which can be used to clearly show the location of the problem for clearer viewing while working. 5. More Efficient: More efficient testing process provides smoother ability to improve the efficiency of workers and make the work process easier. Specification: Item Type: RAM Memory Slot Tester Material: PCB Battery: Coin cell CR2032 x1 (shipped without battery) Adaptation: DDR5 tester all support for INTEL, for AMD all DDR5 interface motherboard, with light emitting diodes to indicate the data line, address line open and short circuit Use: Used to repair the motherboard failure such as no boot, no display, no memory reading, is a necessary tool to repair the computer motherboard.. Package List: 1 x RAM Memory Slot Tester Note: 1. DDR5 tester in testing the motherboard, the motherboard must be plugged into the CPU, the test light will be on, because the memory part of the signal is connected to the CPU.2. After the tester battery is used several times, the tester brightness becomes dark, then the battery voltage is too low, you need to replace the battery in time.3. The tester's various signals, due to differences in the design of the motherboard and chipset of each motherboard vendor, some of the signals may be displayed differently, please use the same motherboard to judge the maintenance staff.4 Desktop DDR5 currently on the market there are two interface types, when one side can not be inserted into the memory slot test, please switch to the other side for testing.5. Memory exists on the motherboard according to the amount varies, the signal name on the memory pin will change, but all the pin number arrangement will not change, so DDR5 with light tester will change the name of the light to pin number, can facilitate customers to clearly know the signal abnormal pin.6. This tester only supports memory hooked up to the CPU. It does not support memory hooked up to for Millbrook or for NB.