[SiriusHardware]

While we await the arrival of the real Commodore experts, I wonder if you can post a table of which characters actually appear when each of the numeric and alphabetic keys are struck? This may reveal a pattern which could point to the underlying fault.

For example, it seems that when you hit 'T' you get 'Y', so,

What character appears when you hit 'G'

What character appears when you hit 'B'?

In case you haven't guessed, I am wondering if the keys in the column T-G-B are being read as Y-H-N, the keys in the next column to the right.