Unexpected Problem ! Help needed fast !

[EzzyYeah]

Hi androidforums.com, I recently updated my JayTech Pid 7901 firmware from 1.9 to 2.0. But when I started the installation for the 2.1 fw, the tablet turned off, and now i'm not able to turn it back on. I tried several ways of entering the bootloader but nothing happens. When i try to turn it on, i can only hear a crackling noise, wich last as long as i hold the power button . and that's all. when i received the tablet , it didn't came with any usb data cable . just a cable with a usb port at the end . If anybody can help me , please let me know about it ! greetings.