Designed for quick testing of signals and voltage on the motherboard. It can be used to test open circuits or short circuits of BGA and CPU. Uses indicators to show each bus and test mode, replacing traditional multimeters, which are more intuitive compared to them. Features: 2. Designed for quick testing of signals and voltage on the motherboard. 3. Used to test open circuits or short circuits of BGA and CPU. 4. Replace traditional multimeter with indicators, results are more intuitive. 5. Compatible with all 1151 motherboards. Specifications: Material: PCB Color: Black Compatibility: for all 1151 motherboards. Size: 38 * 38 * 3mm / 1.5 * 1.5 * 0.1inch Weight: Approximately 26g Instructions: 1. Insert the 1151 test indicator into the 1151 CPU socket and press down the CPU protective plate (note that it cannot power this time), with a 2023 3V battery against the test lamp's pins, all DMI signal lamps turn on. If the lamp is off, it indicates a short circuit. You can shake the CPU compression rod and use a multimeter for further assessment. 2. After the above steps have been tested normally, install the CPU load in the pass test step and use an oscilloscope to test if different voltages, clocks and other signals are normal or not. Package includes: 1 x Test board with indicator 1 x Test board without indicator Notes: 1. When using the 1151 test board, if the battery is against the drain pin, the indicator is off, it may be that the positive and negative terminals are connected backwards, please swap the positive and negative terminals on the battery. 2. After multiple uses, the indicator may turn on or dim because the voltage on the test lamp is insufficient, please replace the battery yourself. 3. Different signals from the tester, such as CPU power supply voltage, may not be detected due to the special design of the 1151 motherboard. Use the same motherboard for comparison or other methods for assessment.