Recovering the data from a dead iPhone is on many cases very much possible depending on the problem. Of course, if one of the major critical components like the NAND (memory chip) is corrupt, or the CPU is cracked, then this will not be possible. In most cases though this is never the case and it can be as simple problem to resolve as a new charge port, screen or battery, some times in some situations your phone may require some logic board board level work, it is something we do offer and able to get your iPhone working again.
It might even be a common problem on an iPhone that render the device unable to charge the battery (an internal component called Tristar that malfunctioning due to not using MFI certified chargers or using cheap non original low quality charging cables, casing it to not charge your phone anymore from when its battery has gone flat). We use electronic repair(micro-soldering) techniques to actuallyreplace this little chip to revive your iPhone!