Solved! Press one key and it shows up 3 times

[albin9956]

The key board any key such as b will show up BBB.

 

[webworkings]

If this is a physical keyboard (not the screen one) then I would say either there is something in it (debris, liquid, etc.) and it needs to be cleaned. Or the keyboard is going bad and either the key (if possible on that device) or the whole keyboard will need replacing.