Hello, I'm experiencing an odd issue with my recently purchased HB-F5. The machine is as new, hasn't got a scratch and looks like it has been stored in it's box for a long time.
The machine works, runs all the cartridges I have thrown at it, everything checks out... except:
All the keys that are not alpha-numeric are not producing the character on screen that one would expect. For instance, the semi-colon key produces the "`" symbol, the ","- key produces the "+" symbol, as if some wires have crossed.
First thing I did was check all the keyboard connectors, solder points and checked that everything is connected correctly. The odd thing is, that repeated key strokes will occasionally produce the correct key, seemingly randomly the correct stroke appears on screen.
None of the numeric and alpha-numeric keys are affected, just the keys right of the 0, P, L, and M. Backspace, return, shift, graph etc all work correctly.
I'm wondering if anyone has experienced this phenomenon and if they were able to solve it. I am wondering if this could be a problem in the key-scan logic, or the timing there-of.
Anyway, any insight or thoughts on the matter would be greatly appreciated!
Jacco.