My unit stopped working after I ran the update on my TS501. Before I formatted the SD card that came with the unit. My computer was able to read the SD card so I do not believe the SD Card is corrupted but never the less I copied all the files on the SD card onto my computer. I formatted the SD Card, copy all the files back, did a hard reboot holding the "Y" key and Power button for 15 second until the screen display the SD Card needs to be inserted. I inserted the card and power the unit down, press the power button and nothing happen. Took the SD card out, the unit turn unit back on until the same diagram showed the sd Card is missing. Turn the unit off, insert the SD card again and unit still will not power up with the SD card inside.
I took another SD card 16gig, format it and repeated the process and still no result. I truly believe the data in one of the files upgraded is causing the unit not to boot up. Autel should put on the website the original software that would have came with the unit so user can restore the unit back prior to the upgrade until Autel can post a proper repair procedure which I am surprise they have not done that already.