Tablet SP_Flash_Tool not connect the tablet in stock recovery mode.

hello everyone,

A tablet MT6572 with android 4.2.2 not booting, again & again restarting after android logo.
at stock recovery mode, it can connect only with "adb sideload" mode.
Is this possible that connecting via usb cable to any tool like adb or MtkDroid or Odin or SPflash or any other method works??

tablet has not any custom recovery, then how restore backup?

Anyone who know the trick for it, plz help.
thanks in advance.