Quoted from GLSP3022:Anyone?
First thing to check with J-8 and J-10 removed and power on, all pins (except the key pin) of J-10 should be high if using a probe or close to 5 volts if using a DMM. Then check with a probe all pins of J-8, they should be high with a low pulse.
Have you been working around the flippers with the power on? Could you have shorted the EOS switch to the lane change switch?