Posted by a reviewer on Amazon

I received my 4digit isa pci powerful diagnostic tool pc computer motherboard analyzer tester and it works fine on pci and isa slots on the motherboard isa slots are of the old technologies you should not see one of these in today’s computers but you will see pci slots in today computers except for the smaller pc which you could not use this device because they do not have those types of slots

Posted by a reviewer on Amazon

So that said this device is only good on certain computers

Posted by a reviewer on Amazon

To use this device power off your system and then find an empty slot and insert it and turn on your system you should see three leds under the four digit display if you see all leds light up then you should have proper voltage coming out of your power supply

Posted by a reviewer on Amazon

Now check the display it should be giving you information on the post codes from your motherboard bios

Posted by a reviewer on Amazon

To see what they mean there is a booklet with this unit that will give you the information on the codes

Posted by a reviewer on Amazon

If there is more than one code you can cycle through them with the buttons on bottom the display

Posted by a reviewer on Amazon

This should give you enough information on what is wrong with your system

Posted by a reviewer on Amazon

This device does not come with any software because it does not need it