I use the 4BR serial cable (ordered along with the display) to connect to the serial port. It seems strange to me that the cable connects the display's TX to the PC's TX pin. However, tech support (in response to other postings in this forum) states clearly that the cable should be usable as-is.
This was done on an EPIA-M 6000 motherboard. Rumor has it that at least some EPIAs have weird COM ports, so I connected the RS232 connector to my Dell laptop instead. Also, the Dell has Windows on it, so I was able to try MOGD.
I still can't get any response at all, not even backlight on/off using MOGD. However, when I connect the display to the Dell laptop, the splash screen goes away.

I've tried resetting the speed to 19200 baud (using a jumper on keypad pins 5 & 6), but it does not make any difference.
What am I doing wrong?
Best regards,
-- Patrik