Capacitor Replacement Kit...
$USD 5.99 -10% $USD 5.39
Replacement ribbon membrane for your Lynx's buttons.
If you've damaged the end connector ribbon or your existing membrane has degraded and your buttons no longer work, this may help.
These are keypad ribbon membranes as designed and sold by Retro6.
You can also purchase them directly from their store if that is more convenient/cheaper for you.