View Full Version : Help debugging dead T3s

11-16-2012, 11:05 PM
Hi all,

I have some Teensy 3s that are most likely dead because they aren't being detected when connected via USB and powered by an external 5V power supply. Are there any good ways to determine the cause of death? Also, I seem to be alarmingly good at zombifying Teensies, so has anyone else run into any issues to take note of while running on an external power supply? (I am severing the connection between VUSB and VIN.)

Thanks :)

11-17-2012, 12:48 AM
If you reconnect VUSB and VIN, do they work then?

11-17-2012, 04:30 AM
You applied the 5V power to VIN and GND, right?

If it were ever to touch 3.3V and GND, that'd probably destroy the chip.

11-19-2012, 08:36 PM
I wish I could try this but unfortunately the Teensy is soldered directly into protoboard - my fault for not adding another layer of separation using extra headers. I will try this if it happens again.