Keeyboards.

[dr. d]

Looks like it's not a mechanical keyboard. You might need to take it apart and clean the contacts.

Mechanical keyboards allow replacement of individual keys. Wireless mechanical keyboards are expensive though.

can it bee repaired by the so-called keyboard reepairman at the mall?

i mean,
some of these folks will say "yes-we-can" to 'most anything, even as they have no idea how to do it...

but if it is a "throw-away child"...