Ebest - PTI9 Diagnostic Post Test Card Debug Card for Desktop & Laptop LCD displays shows diagnosis result of motherboard, especially helpful to pinpoint where is the problem when power on the computer and find no display or machine hang PCI bus reset and CLK signal working indicator (When indicator LED is on indicating its respective signal is fine) Compatible with Phoenix 6.0, Award 6.0 and AMI Bios motherboards which has the PCI bus slot, mini PCI, mini PCI-E or LPC port It can display the halting execution automatic with a couple of times It can diagnose signal which show the problem of CPU, memory, display card and so on