Aristocrat MK6 Watchdog Error

[scottf11961]

So, I have a dual screen MK6, with African Dusk game. Always worked fine. Yesterday, I go to play it, and it keeps rebooting.  It goes all the way to the main screen, an error message flashes for a second, then it reboots.( I managed to get a picture of the message. ).
If I power up with the door open, everything is fine.  Both top and bottom screen come on, and all is good. As soon as I shut the door, the reels spin for a second, the error message comes on for a second, then it reboots. ( with the door open, I do see the words watchdog reset).
I have the audit key, and found the error in the "panic log". .but no options to clear the error..
Where do I go from here??  I do not have clear chips. Never needed them nor would I know where to get them
https://youtu.be/sq5F-lu7q7Y?si=n79yVXzG83gk_Civ

[Heihachi_73]

Loose backplane connection?

[scottf11961]

No. I have other boards I put in with different games,  and they worked fine.