i guess ur title of your box type is not correct , there is a 3 versions clones of sunray vu+ in market , these r :
1-
Sunray solo2 ( the first one came & still some companies manufacturing it)
2-
Sunray SE solo2 ( the new box performaning as sunray solo2 & it has all of its feature but enhanced with security & it has 2 version of its own one with front usb & second without front usb & it has double wifi antenna)
3-
Sunray SE solo3 ( is the small box clone of original vusoloSE , has no front display)
so ur box is sunray se solo3 the 3rd category of upper one & as u mentioned it has no front display , for flashing it it should be same way u flash vu+solo2, u have to format a 2gb or 4gb usb bin flash memorey stick to FAT32 with a good formatting tool ( u can find it
here) , then transfer folder ("vuplus"--> contain the whole image files including force.update file) to usb root , switch off power from back button , insert usb in rear usb , switch on power again & do wait untill it finish flashing , u will notice end of flashing takes around 1 minute & the led will show an interuupted blinking same as car signal
, then switch off box , remove usb , then switch on & image should boot fine & strat working
finally i would like to say u would better been gone to original soloSE as price is almost same & i do have original vusoloSE & happy to have the original , if u want something clone u would better go for 1st or 2nd category as mentioned above