Quoted from dluth:Brilliant, thanks guys. I followed your steps Majdi, and also cleaned the pins on connector J3 (bit of grime came off) and it now works!
Now you will need to get to work re-pinning the Molex connectors, male & female to make it reliable in the long run.
http://www.pinrepair.com/connect/
https://www.greatplainselectronics.com/categories.asp?cat=35