Pellepeloton writes – “I have repaired a quite a few faulty remote controls and most often they are repairable. Common faults are: some buttons not working, not working at all, corroded battery terminals. Often buttons are sticky because of some dirt accumulated over the years from the sticky little hands of your kids? The hardest part of repair is often to open the covers.” – Link.
HOW TO – Repair keys of an IR remote control – Link.