Both of my keys fobs stopped working a long time ago. Replaced batteris on both.
One is just dead and does nothing & the other will work but drains the battery in a week. I have replaced the capacitor inside in hopes is was that, but it didn't help.
My next move is to buy a working used one from Ebay an swap the IC across.
Is there anyone on here that either fixes them, or can give some technical advice ?