Could you please explain in details how you've run Linux on Prestigio PMP3670B tablet? I have a similar device with similar hardware (Prestigio MultiPad 3677_Wi), but cannot boot Linux on it. Thanks. I Just I (talk) 17:55, 6 January 2015 (UTC)
Try FEL boot with SD uart (configure u-boot UART0_PORT_F even if you do not have a way to read the mmc console).
If tablet boots try different values of CONS_INDEX (usually 0 or 2) without UART0_PORT_F.
Seems configuring wrong console can lock up u-boot.