Software: One of few reasons could be corrupted PDS zone.
"Error 0x1DE" issue
On some phones like V975, C975, V980, C980, E1000 and V1050 you may encounter "Error 0x1DE" on phone display. To solve this you need to use SmartMoto. On "Unlock" section execute "Start unlock procedure" with phone connected through clip. Boot mode should be engaged via *# + PowerOn with regular cable or just using the "forced boot mode" repair cable.
How to force P2K phone to enter boot mode?
With P2K phones with mini USB socket you should power the phone off, simultaneously press * and #, then power the phone ON. The phone should enter boot mode.
For other P2K phones you should use special cable to force boot mode (it has 13th and 14th pins shorted). Specifically - remove battery, connect cable, insert battery, power the phone ON.
You may wish to check out the cable pinouts