WANGCL PC Computer Motherboard Analyzer Tester 4-Digit Module Board Test Debug Post Card with External Display Support PCI and ISA

Compatibility:Motherboards supporting 80H 84H 300H ports are suitable for computers with PCI or ISA interfaces.Supports AMI, Award, Phoenix & Tandy 300 BIOS. 4-digit code display, with a 4-digit digital tube for accurate fault code display, and an external display for easy observation. 8LED: Eight LEDs indicate each power supply voltage output (+5V+12V-12V+3.3V) for easy identification of power supply faults, plus CLK, IRDY, FRAME and RESET. Long press S1 for 1 second to start search, press S1 for half a second to start down search until end, press S1 again for 1 second to start down search, press S1 again for half a second to search for the last error code until end. For the bus speed test, press and hold S1 for 1 second to start the self-test function, then press and hold S1 for half a second to repeat, then press and hold S1 for 1 second to return to the analysis state.