Chosen Solution
Managed to drop my MBP whilst the bottom was detached and stripped a component from the board next to the LCD connector. Early 2011 17’ device. Be interested to find out what the component is so that I can fix the issue. Computer still works but with degraded graphics.
The component marked in the red square next to the LCD connector is the part of interest.
Graham Jennings that is reference designator L9011 which is a 90 ohm 100 mA DLP11S Murata common mode choke. Available at places like this and many others. It makes things easier if you always let people know what 820-xxxx logic board you are looking at :-)
