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I started up my MBP, A1150 and a puff of smoke rose from behind the display. I now use an external display by mirroring (thanks to CMD-F1). I can however see faint movement on the display - so it seems like the illumination has gone? Any advice appreciated.

The symptoms would indicate a failed inverter board. I’ve never seen one produce smoke. Before ordering any parts I would open it up and examine it for burned spots. Here’s how: http://www.ifixit.comGuide/Repair/Instal…