Glo Kobo glo froze on sleeping mode

Hi, I have a Kobo glo (for around 1.5 years now). Yestreday i tried to turn it on from sleeping mode but it didn't work. It happened before when the battery wasn't charged so i simply charged it over-night. In the morning it was still frozen-i tried turning it off, basic reset and even factory reset-non worked. I heared that it might be a broken screen but there isn't even a scratch on it. The wierd thing is that the light is on as well.
*Sorry for bad English*


Thanks in advance!:thanks: