M500 locked up - no keys function
Hello,
I have a FCA520MT control that will not communicate with the display. I get the Mitsibishi logo on the display but none of the keys function and no beeps are sounded when keys are pressed.
On my QX521 card the SD LED doesn't light and on the display board RD doesn't light and MON blinks.
I know that the problem is somewhere on the QX141-1 card because i swapped it and it worked for a few days before that one stopped working. Also the QX721 attached to the QX141-1 has LED2 on which i believe is a software error.
Any help with troubleshooting this would be greatly appreciated.
Thanks,