wildwest3163
Active member
I have a line out on my lamp matrix on this Williams sys 11. Its column 2, yellow/red wire, its wire 2 on plug 7 on the mpu. If I switch boards this column works, so I know its a board problem. I replaced the plug, reflowed the solder, checked the resistance in the TIP42, the sand resistor, and the 2N6427 after that, and got the same readings as the other items in each line. What am I missing? its driving me nuts, this is all thats keeping this one from 100% working