I just bought a TZ and received it last night. When I turned it on for the first time it did a self diagnosis and told me the clock was broke. I restarted the game and then the clock seemed fine. The kids and I played a few games (about 10-15) before they had to go to bed. This morning I turned it on and the machine said the clock was broke again. I turned it off and on again and it started working. Halfway through my first game this morning the display went out displaying just a bunch of lines (see picks below) I turned off the game and checked the connections and they look good. I pulled them out and plugged them back in and turned the machine back on and no change. How can I tell if the display is bad or if the board that the display plugs into is bad?

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I just realized I posted in the wrong section.

Thank you guys, it was one of the ribbon cables! I kind of figured the clock problem was the opto, had to double check though.