I'm having problems with my 20X4 LCD module connected to the parallel port of my carputer. The module was displaying junk characters for a while. Then I reset the bios of the carputer to standard defaults. Now I'm only getting the self test blocks on the display, nothing else. The module istself seems to be ok because I connected to my home computer and everything is fine. I checked the status of the parallel port through the device manager - it says " this device is working properly" and that there are no conflicts. I even tried re-installing the parallel port but to no avail. What could be the problem? Can anyone help me?
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parallel port LCD problem