dear friends... I had this Starsat SR-150D ( not the 150D plus). My unit don't have switch at back... When i bought my new one SR-3200cu Super i learned to do upgrading throught this site.. I have upgraded almost all models of Starsat including SR-150Dplus, 120, 130, 200ci, 550D plus , 3200 ultra and 3200cu Super.. but i have killed my SR-150D when i tried to upgrade.. i followed the steps n upgrading as usual, clean, upload the new software but suddenly error came.. it don't accept any software anymore.... I am desperately seeking help from those talented and intelligent guys out there...