Tab 4.0 (7inch) t231 Wifi and Bluetooth connectivity issue

Hey guys
i just bought tab 4 t231 , it was working perfectly fine until last friday i came to know that wifi and bluetooth is no more working.
when i try to switch them on it tries but wifi and bluetooth does not get green.
i have already done factory reset both using android system and using key combination as well.
further i have also tried different roms from different regions for this tab but all in vein. i really need your expertise .\

thanks