On Tuesday, April 17, 2018 at 5:09:33 PM UTC-5, wrote:
On Tuesday, April 17, 2018 at 5:16:04 PM UTC-4, Ronald Tabery wrote:
Two GPS NAV displays failed (push buttons no longer not work).
Looking for replacements
512 705 2396

You can take apart and clean up the buttons, tweek the springs, and get working again. Takes about an hour.
BTDT
UH

Thanks Hank, i replaced all buttons; that did not get the job done.