Kobo Glo not turning on properly

For some time my kobo glo have been acting strange.

Sometimes i cannot turn it on using the slider. I have to use the reset button or plug it in a computer. After that i can use the turn on/off slider normally. Also, both the reset/plug do not always work. Sometimes one work, but not the other. Strange.

I tried factory reseting using the kobo windows app and it said to have instaled the firmware again, i tried formating various times.

The battery is holding out, acording to the battery monitor.

I dont know what to do now. Any tips?