Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not all the buttons work.

This seemed like a great universal for a great price, but after trying all the listed codes for my TV and cable box, I had to go through the longer procedure to search for codes. Then, the TV/Video button still didn't operate my Hitachi TV. Sony tech support says that there is no way to make it work. If the preset codes don't work, then there are bound to be some of the buttons that aren't going to function.