Hi everyone, I'm trying to figure out if my (very new) T4.0 is dead/unrescueable.
Yesterday, I received a brand new T4.0 with headers presoldered and an Audio Shield from Digi-Key. I connected them together and ran the example sketch WavFilePlayer to confirm that they worked (they did), but after unplugging and plugging it in to my computer, my computer would not recognize the Teensy, nor would the audio play or the red LED blink. The last time the Teensy was functioning, I was powering it via USB with an iHome portable power bank which allegedly supplies 5V/2.1A. A Bluetooth speaker was plugged into the Audio Shield's headphone out, and the speaker made a popping noise when the Teensy was disconnected from power.
Plugging the Teensy alone into my computer, the Vin pin yields 5.1V, but the pins for 3.3V and Program are at ~0.01V. The ARM chip gets warm to the usual amount. Holding the Program button while plugging in the Teensy does nothing.
Is there anything I can do to reset the Teensy and have it function again? If not, can anyone educate me on what I did wrong so I don't have this happen again?
Additional Info:
Powering the Teensy from the same power bank (which was been discharged further since last night), Vin yields 4.94V.
Following instructions from this thread, the resistance between 3.3V and Ground is ~190K when the Teensy is unpowered.
Yesterday, I received a brand new T4.0 with headers presoldered and an Audio Shield from Digi-Key. I connected them together and ran the example sketch WavFilePlayer to confirm that they worked (they did), but after unplugging and plugging it in to my computer, my computer would not recognize the Teensy, nor would the audio play or the red LED blink. The last time the Teensy was functioning, I was powering it via USB with an iHome portable power bank which allegedly supplies 5V/2.1A. A Bluetooth speaker was plugged into the Audio Shield's headphone out, and the speaker made a popping noise when the Teensy was disconnected from power.
Plugging the Teensy alone into my computer, the Vin pin yields 5.1V, but the pins for 3.3V and Program are at ~0.01V. The ARM chip gets warm to the usual amount. Holding the Program button while plugging in the Teensy does nothing.
Is there anything I can do to reset the Teensy and have it function again? If not, can anyone educate me on what I did wrong so I don't have this happen again?
Additional Info:
Powering the Teensy from the same power bank (which was been discharged further since last night), Vin yields 4.94V.
Following instructions from this thread, the resistance between 3.3V and Ground is ~190K when the Teensy is unpowered.
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