Both of my Surface 1 stylus pens quit working. I have a Walmart pen that works, but I like the original Surface ones. I read to check the firmware, but it only said what file to look for in surface 3, & the file it said to look for wasn't there. There wasn't a yellow trouble icon anywhere so I don't think that's the problem. Do they need charging or do they have a battery? The backup pen I used had been sitting for quite a long time.