OK, so here we go. I demounted the #PowerBook540 for "baking" the display. It's very different from all the videos I've watched about it. It doesn't have those metal rotating eyelets that release the display and that can also wear out.
Tested our cheap oven from a Swedish furniture house with a good digital barbecue thermometer. It's very exact with a negative offset. Only varies at 90°C in between 85-87°C.
#RetroComputing #BakingDisplay #Apple