If it’s only four months old, it should still be under Roku’s 1-year limited warranty. I’d start by contacting Roku Support through their website and submitting a warranty claim — they’ll usually ask for the serial number and proof of purchase.
Before you do that, a few quick things to try:
• Restart the Roku device (Settings > System > Power > System restart).
• Re-pair the remote (hold the pairing button inside the battery compartment for 5+ seconds).
• Try a different USB cable/charging brick — sometimes it’s the charger, not the remote.
• Fully drain the remote, then charge it to 100% uninterrupted.
• If it’s a rechargeable Voice Remote Pro, make sure it’s updated (remote updates happen automatically when paired).
If only the power button works, it could be a pairing issue or the remote firmware glitching — but if it won’t hold a charge, that’s more likely a battery defect and worth a warranty replacement.