Have I screwed up my new T8SG?

I was starting to do the initial programing on my Jumper T8SG an all was going well. I laid it down and went to dinner. Now it is very hesitant to start up when I push the power button, but when it turns on I get nothing on the screen except a large USB insignia...... Help!

Thanks for the answer! I really don't have a clue about all this. Firmware archive? You are talking to a rank amateur here......... sigh........... I would have thought the Jumper would arrive ready to set up. Is this downloading necessary? I really don't understand what it is for......

Also, which DEVO system is the Jumper T8SG?

Thanks for the help!!! When I download and unzip the file in the nightly build, after unzipping, it shows a .dfu file, which I can't open. Also, I have the T8SG V2, Plus edition if that makes any difference. The .dfu file I am unable to open is......

deviation_T8SG_V2_Plus_v5.0.0_ccc06d0.dfu

Hi, thanks for the answer. I have figured it out and gone through the firmware, drivers, upgrade several times. The device manager now sees and labels the "SMT device in Dfu" mode and creates a drive (transmitter), however I am unable to load anything in the drive. I keep getting a message when I try to open the drive that it wants a disc. If I don't put a disc in then it tells me the drive is invalid. I have started a new thread above this one for this problem. When I look at the properties of the drive I installed, the author is STmicroelectronics, but the opening paragraphs of the instruction manual tell me not to install STmicroelectronics. I don't know which firmware or drivers are STmicroelectronics or not.....

Hello,
I've just registered, because had almost the same issue with my Jumper T8SG V2.0 Plus. I managed to solve the problem, but it was not so easy.
Step by step please answer my questions:
- are you able to flash the firmware to your transmitter (only the firmware)?
- what kind of tool do you use for it (Deviation upgrade tool or Dfuse)?
- do you see the flash drive (2 MB) under Computer Management / Disk Management, what is the status of the disk (unknown, not initialized)?

Hi, and thanks! I am trying to use Dfuse. I can upgrade using the upgrade too and I see the drive in Device Manager called STM Device in DFU mode. When I go to my computer it shows a new USB drive. However, when I try to open that drive so I can put in the new firmware, format, ANYTHING, it says the drive in "invalid".

FIXED IT! I was finally able to access the USB drive, format the darn thing and then reload it.

PHEW!!!

Got same problem on irangeZ IR8m (same software), cannot se it as a disk and therefore can't copy any file. How did you fix the problem?
Thanks!