please help, i have a demo man i recently purchased. i was trying to do preventative maint. and replaced the large caps on the power driver board. reflowed solder to all the power going in. i placed the board back in and got a horizontal line in the display and missing some of the lower voltages. i sent that board in for repair and ordered a new rotten dog wpc89 board and installed it. i replaced all ribbon cables before installing new board and now i still have horizontal line and auto plunger activates as soon as it turned on.the balls do not come out but will make firing sound and all other solenoids will ball search. looking for ideas. all voltages are lit on new board, removed all ribbon cables and still same issue. please help.