H60-L02 totally bricked

Hello togehter,

Maybe someone has an idea what i can do with my H60-L02. I already studied this forum...
Following problem:
- I installed the latest Dev-Stock ROM 5.9.1, coming from the latest 4.4 Dev-ROM - everything was OK
- Now i wanted to go back to latest Stable ROM B316
-> entered fastboot mode and flashed all 6 img's mentioned in several threads.
Now i have always a boot loop!
-> tried with multitool (unbrick) - the same

I tried B307, B611, B118 (EMUI 2.3) - again always the same.

So i think i did everything i can do - always a boot loop...

Are there more possibilities except flashing the 6 img's? I don't think it's a suddenly happend hardware error.

Thanks in advance
btw - great forum!