T550 04Y2387 Backlit Keyboard

[WVZR1]

I've a T550 keyboard issue. Randomly the 'shift' key launches maybe a 'brightness control' - some gibberish & a flashing display manager on the right side. I guess I need. I've done some of what seemed reasonable diagnostics..

Any reliable vendors/source for this T550 Backlit Keyboard? I've not needed parts for quite some time. If you've a keyboard I'd consider a buy, I didn't place it in Marketplace but if we've a regular that sells parts I'd appreciate being directed to whoever. I try to avoid eBay and I ain't a Bezos fan either.

Thanks