Pinebook 14" keyboard misses keypresses UPDATE

[MarkHaysHarris777]

          


In the pics above we're looking at the pin(1 -- 12) edge of the Pinebook 8051 MCU responsible for reading the keyboard matrix.  The left pic shows the bent pin(12) , and the pic at the right shows the re-soldered pin(12) !

In 3D the pin(12) never got soldered at all ( because the P&P robot bent the pin! );  pin(12) was shorted against pin(11) which prevented the 8051 from detecting Alt_L and Alt_R (both alt keys were effectively dead).

I used a microscope and surgical scalpel to straighten the pin, then coated the junction with a thin film of rosin flux gel.  I then applied one very quick stroke of a very sharp lite-tinned immaculate soldering tip along the outside edge of the pad|pin;  if this had been any other pin except the corner pin it might not have been possible!

          


Output(s) from the xev tests above show the Alt_L and Alt_R keypress and keyrelease. The entire keyboard checked out;  the good news is that the shorted pin(11) & pin(12)  did not damage the 8051, and all is good!