This motherboard diagnostic card, also known as a 'POST card' (power on self test), is a powerful diagnostic tool for technicians and administrators to troubleshoot various problems of compatible laptop by using the 25 pin parallel printer port (LPT) and USB port (for power). 

Features:

Check the hardware in minutes.

Pinpoint problems you don't even know you have.

Easy installation with no need to open the computer case to use.

Does no harm to the device while insert into the wrong slot of the main board.

Designed to work on desktop as well as notebook computers through the USB port (for power) and the 25 pin parallel printer port (LPT).

Must use the parallel port and the USB port at the same time to operate this analyzer. 

Specification:

Interface Type: 25 pin male printer connecter.

2 LED indicator: KEY, +5V.

Hexadecimal character display.

2 keys for codes PREV /NEXT.

Compliant BIOS: PHOENIX BIOS4.01~6.01, AMI BIOS 6.24, AWARD BIOS 4.51

Concrete Computer Type: IBM, T20, T21, T22, T23, A20, A21, A22, DELL640, TOSHIBA 4030, etc.