Quote Originally Posted by hancock View Post
...... is there any way to replace the flash chip?
Replacing the chip requires specialist kit and skills. Reballing is required soldering in the new chip and then it needs reprogramming as well. not something that you can simply be talked thru, you need both the skills and equipment 'hands on'.

Leave it for an extended period without the battery sometimes seemingly dead devices do come back to life if unpowered for long enough but be prepared to accept it's now only good for scrap.