PUMPKIN CAR STEREO SUPPORT CENTER

Hello,
Ive got a Problem with my Car Head Unit.
I tryed to flash new ROM on the device and after Flashing the Device turned black on screen and wont wake up. I tryed Recovery Mode, but it failed. only the LEDs are switching short on but still no Life Sign from the Device. Could you help please Resetting the Device?
Greetings

Order Nr: 306-9778711-1167508
Device Information:
MCU -Version：
MTCC-KLD6-V2.97
Aug 02 2016 10:35:08
Android-Version：
5.1.1
1024*600
Kernel-Version：
3.0.101+
chun@hctr930 #134
Fri Dec 23 16:19:23 CST 2016
Build-Nummer：
rk3188-userdebug 26122016.16:28:18

hi,
here is firmware.
https://mega.nz/#F!cd1XEQBT!bpFEJtpzJBgi0mYQEWukNA
You can download the files to the root content of one sd card and insert it into the GPS slot .Then do referring to the following video.
https://www.youtube.com/watch?v=Vtfwfh0Olu4
Regards