Replace remote control infrared LED
I purchased a Dynex 32″ TV for my apartment during college. It was a really good TV, however the remote control wasn’t that responsive. The remote got worse over time, and practically became useless within a year. So instead of purchasing a new remote, I decided to open my current one up to see what was wrong with it. I figured it was either the IR receiver on the TV or the IR Transmitter on the remote control. You can also use this tutorial if your remote is very weak. If you have to be very close to the TV to change channels even with new batteries, means infrared LED is weak.
Note: This tutorials assumes that you have soldering experience. Please make sure you take caution when working with a soldering iron.