In morning I still using it without issues. Then battery low, i plugged the powerbank to charge and put inside backpack to go for work. When reach office, the device won't turn on or off. Tried force shutdown not working, plug charge also not working.
I have check the sd card still have content.
Dis/re-connect the battery not working
Paper clip not working
But I check the battery very cold even plug charging for few hours
No led light or boot up, I dont know maybe im using the KSM+koreader not using the stock fw or not.
The screen still stuck at sleeping
Is anything can help? or any chance the battery totally dead or the microusb port broken (becos if feel like no power to run the device)