I repaired 2 days ago my Kobo GLO with similar Problems.
After control i find 2 problems. Old dead battery , and faulty SD card
Changed old kobo battery with new one Galaxy S3 mini battery ( 3.8 volt 1600
mah ) buyed in nearest Phone Repair shop. Soldered it directly to motherboard.
Then i change old sd card with new one and new image. Then i press power buttons. And Kobo become alive.
But i recommend you first of all, try to gently press backside of kobo area power button. And when pressing backside, slide Power button.
Because after using long time power button area becomes loose and then slider of power button simple do not press real button, which is soldered on motherboard.
If this is the problem your klobo will open and close normally.
Sorry for my bad english , i dont speak or writed in english for near 24 years.
|