My key fob stopped working after only 18 months. Thought it was a battery but then saw posts about bad solder joints. Couldn't find any pics though. So I opened up my key fob and sure enough it had bad solder joints. Here's a pic...

I am terrible at soldering but after laying a little heat to the joints they went back together and it works.

I am terrible at soldering but after laying a little heat to the joints they went back together and it works.