[Q] Hard Brick Samsung Galaxy Trend topic

Hello everyone !

It's been two week since i've hard-bricked my samsung Galaxy Trend (which is really smilar to galaxy S3).
I've looking for different solutions but i haven't found any that correspond to my trouble

Situation :
- Hard brick by trying to instal TWRP by dd command.
- No "Samsung logo" on boot
- No recovery
- No download mode
- When plugged to a macbook, it's detected as a usb modem, the kernel is able to read some data about it (Manufacturer, Product ID etc...)
- When plugged on a pc running linux, it does appear as a USB, also able to read informations about it etc....
- Does not appear as a USB device -> no /Volumes or /dev/usb...
- I'm abble to get access to the PCI directory on Linux

Solutions tried :
- Boot download mode -> No Download mode
- Find an unbrick_img to put on sd card, i don't find any debrick img or a galaxy trend, should i try to use the S3 ?
- Try to mount it as a USB device, but I'm not able to find how tou mount it

Solutions not tried :
-JTAG

Do you have any ideas ? :confused: