Leaderboard

First pic is where your brown pins go... got to check theres good continuity between each one. Then got to check the big power darlingtion transistors/triacs. Magii have obviously done work in the area to get the payslides working

Yeah, check the fuse holders are clean... if you have some lamps then its not a power fault if there are a few 'rows' out then thats its a different story. Think of it as a battleships grid a row and a coloumn. If you have a load of lamps out its probably more like a few rows or coloumns not working. You check for common wires between each lamp not working and trace the back to the board pin. The next step is to test the big power transistors with the metal heat snycs individually. This is a way to approach it with most techs of a similar age.

Theres a schematic available. If you dont know tech (mpu4 is not my forté either....ive only done 1)... check your voltages out of the psu first... check the fuse holders are not overly glazed. Then start working back on lamp matrix with the schematic. Few other decent mpu4 people on here might help.

Hmm, that means the via has been ripped out when the original transistor was removed, unless it's rotted of course!