pureview 808 doesnt boot at all

[eilotas]

hi. i own nokia 808 3 years now and its been a long time that i ve stopped working it since it stopped suddenly charging and boot.
i put it on the charger sometime it shows it is charging normally but when i press the power button the nokia sign appears then the dots and thats it after dead again showing charging
i managed 2-3 times to finally open it for minutes but after closed of battery fast.
i thought it was battery problem so i bought a new one but the same problem occurs.
its such a stragne problem and now i cant even reset it mannualy with the 3 or 4 button solution
any help?
thanks

[93tid]

Try a complete clean firmware reinstall using the Nokia Software Recovery Tool from a PC. You will lose all data and settings on the phone, but I guess you are OK with that, since you cannot use the phone now anyway.

[eilotas]

it doesnt even recognise it. says malfuction usb device...