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Monday 14 May 2018 at 14:56
Quoted from Hosehead:My TZ machine stays in testing mode and won't do anything else. I replaced the WPC board with a new one because it had a fried chip and I was getting the ground short row 1 error. It worked for a few games then started this testing mode on start up. Love the machine but recently...
Source: http://pinside.com/pinball/forum/topic/twilight-zone-stays-in-testing-mode#post-4396944