Not sure why nobody has mentioned the lines from the wiki that say:
If the upgrade fails and you get a white or black LCD screen.
If the upgrade fails for some reason (wrong file, power failure) you may get a tinySA that seems to be bricked. Luckily it is impossible to brick the tinySA. Follow these steps to unbrick:
tinySA
- Switch off.
- Open the case by removing the 4 screws at the back
- Connect the two pcb edge points marked VDD and BOOT0
- Switch on.
- Lcd turns white
- You can disconnect the VDD and BOOT0 if needed
- Connect to PC using the USB cable
- Just to be double sure, open the device manager or Linux equivalent and check a DFU device is added and the driver is correctly loaded (no yellow exclamation mark)
- Update firmware
tinySA Ultra
- Switch off.
- Press the Jog button down.
- Switch on.
- Lcd stays black
- Connect to PC using the USB cable
- Make sure you hear the happy sound from your PC to be sure a driver is correctly loaded. If this does not happen, try a different USB cable, a USB 2.0 port or different computer
- Just to be double sure, open the device manager or Linux equivalent and check a DFU device is added and the driver is correctly loaded (no yellow exclamation mark)
- Update firmware
NOTE WHERE IT SAYS:
Luckily it is impossible to brick the tinySA
