Open the notebook (do not change anything)
I open the notebook because I clean the fan
Open the notebook to install an SSD
Open the notebook to replace the battery
Please answer every question if possible
Yes
Yes
Yes
Yes
Generally speaking, as soon as you open the device, the guarantee is void
Yes, as soon as you open the device it is no longer "capable". If you send it back e.g. Because something went wrong and the manufacturer recognizes that you have opened it, you will not get a new one or it will not be repaired.
1. + 2. Maybe it depends on the manufacturer. In the case, rather.
3. Yes
4. Yes
Yes, on all four points. The guarantee will be lost if you only open it and do not change anything. If you still have the receipt or the guarantee certificate, have a look there, there should surely be more.
Some manufacturers even provide instructions for cleaning the fan. But is the case and is more the case with older devices.
https://www.computerbase.de/forum/threads/garantieverlust-bei-notebook-festplattenwechsel.753470/
