Hi kelvin gray
Disconnect everything and test the screen manually. The channel switching problem could be caused by magnetic interference from other devices, isolate your screen and re-try to switch channels. Check the batteries and replace them with fresh ones. There is a simple method to test your remote control to see if it is malfunctioning, it will require you to have a digital camera . First take out your camera and your remote control, then point the remote to the front of the camera while looking at the display on the camera, press any button and see if there is a light coming from the LED. If you see a light from the remote then is working and the t.v is malfunctioning. If you don't see a light, then the remote is faulty and would require replacement of the device.
post back your findings.