What is this board inside my all in one computer for?

[Bud]

Pagers, ICOM radios, all-in-one computers.
It is waiting...

[MathWizard]

Someone installed these in computers as a troll.

Bit of an expensive prank, if done in a large batch of these computers.

@Lis_182_evo, what is the make and model of this all in one computer?

Someone should ask Bill Gates LOL

[schmitt trigger]

As others have already mentioned, mentioning the all-in-one’s brand and model number will allow us to make more accurate assumptions.

EDIT; If you disconnect the board, will the computer continue to operate normally?

[pcprogrammer]

EDIT; If you disconnect the board, will the computer continue to operate normally?

See: https://www.eevblog.com/forum/reviews/whats-the-fee/msg5720781/#msg5720781

It does not interfere with the normal operation of the computer.

Unfortunately the OP has not provided any further information and has not logged in after that last message. So maybe we will never know what the board is for.

[schmitt trigger]

A couple of men in black suits appeared at his doorstep and showed him a flash unit…