But I've hit another road block. I tried a jumper cable last night with no luck so I thought I'd remove the board for a closer look at what is doing on. There is corrosion on the bottom of the board around the read port and there is a short between the read input and ground which obvious isn't correct so that needs address but its not the main issue.
To remove the board I obviously had to remove the keyboard again but my problems with the keyboard connector on the board continued (if you watched the 2nd video you'll understand) and this time as well as pulling out some pins again its cracked the connector on the board and the bent pins have damaged the ribbon. Safe to say it nearly went out the window at this point. I've been over the keyboard connector in detail and I don't see any way it comes apart to release the ribbon so I can only assume the issue is from the previous owner. I think at this stage it will be easier to replace the ribbon and motherboard connector with pins and wires as to be honest I could possibly save the ribbon but the connector is a lost cause.