If your TV box is unresponsive to your remote, there are a few things you can try to get it working again. First, check the batteries in your remote and ensure they're properly installed. If that doesn't work, try resetting the TV box by unplugging it from power for 30 seconds and then plugging it back in. Once the TV box turns on, press and hold the pairing button on the back of the unit until it starts flashing. Then, use your remote to scan for the TV box's signal and pair with it. If you're still having trouble, contact your TV box's manufacturer for further assistance.