Phone [Q] Help! Lenovo S860 Hard Bricked

I have a Lenovo S860 was hard bricked because of flashing a wrong ROM.
The condition now is:
- It is dead. When Plug in USB the indication in the phone showing Red LED (like charging status). No Android logo display (only blank screen)
- Plug in to PC. The PC is able to detect the USB as "MediaTek PreLoader USB VCOM Port (COM7)

What I have tried:
- Flash tool ver.5.1348.0.100 and ver. to flash Factory ROM Failed with error: "BROM ERROR: S_BROM_CMD_STARTCMD_FAIL (2005)"
- Press Vol+ button then connect USB --> No response
- Press Vol+ and power button --> No Response
- Press Vol+, Vol- and Power Button --> No Reponse
- Press Vol-, Power button --> No Response

Please kindly help me to solve the problem.

Thank you very much.