Same problem faced (white screen on boot up), tried with CMOS battery replaced & ALWON jumper position changed, but problem not resolved
Also tried hard reset by placing jumper on input board, but still console not starting.
Anyone has lead about SBC board, are they different in GLD80 & GLD112??
As I have 2-GLD112 & 1-GLD80, can I keep one common spare SBC board for all 3 models??