Q: using my wireless key bo.ard  give an issue with typing the o. with aperio.d o.r vo.lume keys no.t wo.rking pro.perly

If this has just started, there are a couple of possibilities that come to mind:

• low batteries
• new or updated software

you'll need to tell us a bit more... I'd certainly check batteries first.

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the last part of this article tells how to visually test your key-presses > Troubleshooting wireless mouse and keyboard issues - Apple Support - ÇÇÇ

Cool. Looks as if it is kinda intermittent

thanks f >o.< r  y >ou< r input I will change the batteries.

A cheap battery tester or multi-meter always comes in handy.

let us know how it works out

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Reset the PRAM.

Barry