I Have a GXV-3275 that completed a firmware update and now won’t boot passed the first GrandStream logo with the little swirl on top. I have read the administration manual and tried a firmware update from SD card while Pressing the Vol down and home keys right after the button lights go out but it just sits on the GS screen. The light in the top right corner of the phone says a Yellow/Green color as long as the SD Card is inserted. If I take out the SD card and let it try to boot normally the light turns green but then goes to red. and the screen never changes.