Hi, I have a KM 2560, and I have just replaced the main board, but the screen is blank. The machine comes on and all, but nothing on the screen, only the memory light flicks for about three seconds and that's it. The current problem, was that when the machine is turned on, "Program loading would appear on the screen, and pause at that, so we tried updating the firmware, and the machine didn't seem to be reading any removable device that was plugged into it, flash drive, those memory cards, nothing of external memory could be read, so we had the main board changed, and now we got nothing on the screen, and when we put the old board back, it doesn't make any difference. Anybody faced this problem before.
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