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Sunday 13 May 2018 at 10:19
Issue seems to be resolved by replacing caps CN2 and CN7 on the power supply. The display hasn't hiccuped since replacing them. Hallelujah!!
Source: http://pinside.com/pinball/forum/topic/more-tmnt-display-woes-dmd-is-resetting-itself-under-flipper-load#post-4395331