When it comes to technology I have always found myself struggling. There was the time when my Walkman refused to play. I took it to the repair shop only to find the batteries were upside down. That would have been dismissed as an oversight if I hadn't done it two times in a row. Hit and trial worked a long time for me till my smart sibling told me there was a plus and a minus that one was supposed to watch out for. I still sometimes wonder, though, why the signs must be hidden deep down inside.