Medion P4501 freeze on brand image I have a Medion P4501 phone. After the battery died, i start charging but it frooze on the Medion-brand. I was looking for a long time how to solve it but nothing worked. 

The problem is: 


the power button + volume up/down doesn't work: after more than 20 times, turns up only the Medion brand 
Fastboot (power button + volume up and down) gives an error: 
'failed to open file/mmcl/p4501.v1/CONF/P4501.xml with error no -1'
Usb debugging is turned off i believe. When i plugged in the phone, i couldn't find it in the microsoft divice manager.
Adb didnt work because it didn't find my phone
the phone isn't rooted


I hope someone can help me with this. I cracking my brains on it for a few weeks.
Flashing a stock firmware should solve your problem. 

Firmware download links from here. 
Additional instructions, guide from here