The 400d body was giving err99 after each shot. The shutter curtain was opening, but closes immediately. It should be the shutter, so I disassembled it.
And I have found 1 of the 4 screws, which hold the main PCB hanged on a piece of isolation tape… I wonder how many times was it jumping from one side to the other of the body, before getting captured by the tape.
The other 3 screw were totally loose in their place.
Interesting is, that the body was 100% never disassembled, as it was bought in the original box from an official shop. That means, the screws were not tightened in the factory.
Catch 22:
If you open the body, You can’t go back for warranty.
If You bring it to the official servicepoint after the normal warranty, You will never know, that it was a flying screw in the inside, which killed your shutter (for example).
János
Anyway, the 350d and the 400d are not my favorits, from the technical point of view…
canonrepair
