1. Connect a 12V DC power supply to the PCI-E slot tester, and plug to the PCI-E slot of the motherboard.

2. Press the on/off switch of the tester, and all the lights on the tester will be on. If some lights are off, please check whether the foot of south bridge is open circuit or short circuit, or the isolate capacitor is damaged.

PCI-E slot tester is mainly used to repair the PC motherboard when the POST CODE card shows FF or no display, unstable working or display card no display, etc .