DIAGNOSIS The solar panel on the Eco Remote only provides a trickle charge. If it's never near a light source or you're in a dim room, it will deplete the internal battery faster than it can recharge.
<FIX The fastest solution is to forget the solar for now and use USB-C.
- Plug the remote directly into a USB charger or the TV's USB port using a USB-C cable for a few hours.
- For the solar to be effective, you must place the remote face-up (solar panel side up) in a consistently bright spot, like near a window, when not in use. Indoor lighting often isn't strong enough.
- In the TV's Settings > General & Privacy > Power and Energy Saving, you can turn off the remote's microphone (Voice Wake-up) to save battery.
IF THAT DIDN'T WORK The rechargeable battery inside the remote might be faulty. You can open the battery compartment (slide off the back cover) and check for a model-specific CR2032 coin cell battery. If present, replacing it can sometimes help, but the primary power is the internal Li-ion pack.
HEADS UP You can use the Samsung SmartThings app on your phone as a full-function TV remote in a pinch. Also, if the remote is completely unresponsive, press and hold the Back and Play/Pause buttons together for 3 seconds to force a Bluetooth re-pair with the TV.