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 can't keep it working. How do I get past the testing mode? Thanks
Are you certain the old board was fried? The only way to be sure is to swap it into another game and see if it acts up the Same way.
It does sound like you have a short somewhere, but the new board is probably not toast; a switch short doesn't carry enough voltage to cause a problem like that
Does the game not come out of test mode if you use the service buttons?