Hi there and welcome to Just Answer. I'm Steve. Thanks for asking your question. I'm sorry to hear about your Wii.
Let's check the sensor bar first.
Do you have a digital camera or mobile phone camera? If so, grab it, turn it on, and then point the remote at the sensor bar.
If the sensor bar is working, you should see blue lights from the front of the bar in the viewfinder of the camera or on the phone.
If you see no lights, the sensor is bad.
Try that and let me know.
I'll be here.
sensor was the problem Thanks