I recently inherited a High Speed with all kinds of matrix issues, both lamp and switches. Let's start with switches.
Rows 1,2,3 all register as the switches assigned to row 3. For example, switches 1,2,3 all show up in switch test as switch 3. This is consistent across all columns in rows 1-3. I have repinned the molex header associated with all rows.
Now, on to lamps. Pactically every lamp, when tested in single lamp mode, triggers multiple lamps. Most lamps result in four to six other lamps lighting which are not all neccessarily in the same row or column.
I am going to preform the matrix test by removing their associated connectors connecting a jumper/test bulb, but am wondering if there is anything else I should consider in the trouble shooting process.
Any feedback shared is appreciated. Thanks!