Dead Raspberry Pi 4
There are a number of ways a Raspberry Pi may appear “dead” or “bricked”. Most times when a Raspberry Pi appears non-functioning there is a benign issue that may be resolved.
I, on the other hand, managed to go all out and truly break my Pi!
- Solid red LED
- No ACT green LED activity ever
- No video output ever
- Trying to load a recovery.bin does nothing
Testing the voltage between TP1 and TP2
shows a stable
diagnostic video by Chicago Electronic Distributors
was the only reliable test for me in the end. This revealed that
my 3.3V line seemed bad. The voltage was at
the 5V line seemed healthy at
This is most likely because I recently accidentally connected my Pi to both the red pin (fourth wire) on a USB UART serial adapter at the same time I powered the Pi over USB. This was a mistake. As Adafruit suggests;
The important thing here is to only power it from one source, the USB power adaptor or the Console Lead BUT NOT BOTH. Unless you have a Pi A+ or Pi Zero, don’t connect the red wire!
After doing that for a sustained time and noticing my Pi overheating and becoming unstable I encountered the issues with my Pi not booting properly anymore. Money aside, wasting any working tech is disappointing and I have learned a valuable lesson.