Fantastic explanation: very clear.

Only the first step is a bit tricky: the unclipsing of the white « screen ». I recommend to get a strong suction tool like for glass: I got one for 6€ in the tool shop nearby, documented as able to bear 50kg. Then super easy.

I has to dismantle my equipment because the battery stopped functioning. And you know what: it was a matter of ensuring proper contact of the taped wires on the battery itself. No need to replace it: everything now works.