Hello everyone. I have a Stern Stingray with the bally/stern 6 digit displays and 2 of the displays are out. I swapped them with the 3 working ones I have and they display just fine so it's not the MPU, connectors or cables. I also followed Steve Kulpas guide. http://stevekulpa.net/pinball/bally_disp6r.htm
I reflowed the head pins, changed out the 6 resistors with 100kohm 1/2w and replaced the decoder chip. When I turn the game on they just don't seem to get power, no orange glow or anything. The nipple is not busted and the glass is not damaged. The only thing I have not done is change the transistors. I cant believe that they would all be bad unless I am missing something. I'm hoping that the displays are not dead but aside from changing the transistors I am out of ideas. I appreciate the assistance in advance.