Fatima keeps throwing or dropping the TV remote. She also keeps taking it apart from time to time. I believe we've had four or five remote changes over the last one year or so. The TV wouldn't turn on last week. It's a monitor-turned-TV which does not have buttons to change channels and stuff. I found that a component lead in the remote was broken. Tried to fix it but it didn't work. Couldn't decide if it was a faulty TV or faulty remote, so I set out to web search for TV remote testers.
I found several different DIY schematics, but the technique that I liked best was to view the remote through a camera. Point the remote at the camera, press a button and you should see a white LED flashing. The camera captures Infrared radiation. Simple and effective. The remote was broken. I bought a new one. The TV was also at fault, the IR sensor in the TV had to be replaced.
1 month ago