Immo, I'm trying to help you in every way, but try searching this forum topics while I search the whole internet for you to find any solution that suits your problem.
I think SEMC Tool 1.3 can be useful. I've just read in one other forum topic that is can flash, reflash and etc your phone. Here's copy of what I've read:
"I just tried reviving a dead k750 with SEMC Tool 1.3
Did the following:
1. Flash EROM with Recover Certificate checked
2. Flash EAL MAIN and FS
3. Flash EEPROM RED CID36
4. Clear SP Lock
No error messages, all went fine!"