PCG10 / K801621TroubleshootingThe Power LED is not ONNo communication with the computer (check that the cable is connected toparallel printer port, LPT )Check the printer port setting in the BIOS SETUP of the computer. Selectstandard parallel port mode (SPP), also named "compatible" mode or"Centronics" mode.No output signal (Ready LED on the front panel is out)No wave form is selected, select a waveform.If the above tips have no effect, then test on a different computer or replace theprinter port card.

Velleman Instruments PCG10 Reference Manual