I homebrewed my 2ds a long time ago and I played many games just fine, when out of nowhere its screen started to go off and on. I noticed that if I played with the sleep switch i could turn it back on. It got to the point where i could not turn my 2ds on unless i had the sleep switch pressed all the way to the side. Mine did it everywhere, ingame, apps, and the home menu. I think my problem started because I dropped the 2ds a couple of times when I opened it I saw the sleep switch had slide to the side a little.