Symptoms
- One button (like 'input' or 'menu') does nothing
- All other buttons work fine
- Button feels different to press than others
- Started after a spill or drop
Likely causes
- CommonWorn or dirty contact under that specific buttonFrequently used buttons wear out their rubber contact dome before others do.
- CommonLiquid residue concentrated under that buttonSpills often affect buttons closest to where the liquid pooled.
- PossiblePhysical crack in the button or housing at that spotA drop can crack plastic locally without affecting the rest of the remote.
- PossibleFunction reassigned by a setup/programming stepOn programmable remotes, that button may have been intentionally remapped.
What to do
- Confirm the button isn't simply remapped to a different function by checking the remote's programming/settings if it's a universal remote.
- Press the button firmly several times and note if it works with more pressure, suggesting a worn contact.
- Use a phone camera to check whether that specific button triggers an IR flash.
- Open the remote (if comfortable) and clean the contact under that one button with isopropyl alcohol.
- Reassemble, let dry, and retest.
- If cleaning doesn't help and no IR flash appears for that button, the wear is likely permanent for that key.
Tools and parts
- Phone camera
- Small screwdriver
- Isopropyl alcohol
When to call a pro
Not typically needed; if the button is essential and unfixable, a replacement remote is the practical solution.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.