Features: 1. Can accurately, stably and fast find computer failures 2. The code value of "Start Code" is specific "0000" or "FFFF", which is at a glance 3. Use the four-digit fault code to display 4. With ming-sound to report faults function 5. Anti-insertion or misinsertion will not burn any parts 6. Suitable for PCI bus 7. Not inserting the CPU and other empty board, just power on to diagnose important signal situation in the board 8. Can fully compatible with all kinds of high, medium and low-grade motherboard (Intel, AMD and other manufacturers' low, medium and high-level and server CPU platform motherboard) Indicator function of the diagnostic card: BIOS: Mothermoard running, the light will fash while there is a reading operation on the BIOS. IRDY: The light will flash when having a IRDR signal, otherwise, it will not lignt on. FRAME: The light will flash when there is circular frame signal. Light will constant on in peacetime RST: Reset RESET: power on or press the RESET switch, the light will be on for half second and then be off. Because, if light is not off, the reset pin on motherboard connected to the acceleration switch or the reset circuit broke down. 12V: Empty board powered on, the light should be constant on, otherwise the voltage or motherboard has a short circuit. -12V: Do ditto 5V: Do ditto -5V: Do ditto 3V3: This 3.3V voltage is unique for PCI slot. Empty board powered on, the light should be constant on. Some of PCI slot motherboard has not this voltage, the light should be off. Specifications: Usage: Maintenance tools for computer motherboard Specifications: All produced by patch components, do not hurt your hands, LCD characters display Color: Shown as the picture Package weight: 48g Package Include: 1 x Diagnostic Card 1 x English User Manual . Note: The display will be sent randomly, and make sure you will not mind before ordering.