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Raspberry 4 burnt? How to know

Sun Dec 01, 2019 1:27 pm

I was testing an image on a rasp4 and the things on my table were messy. The raspberry problaby touched a wire on 127v outlet connected to my power supply unit and It made a little pop. Then it stopped working.
It doesnt show anything on screen, but the red light is on (no green light though). This light shows up still once the raspberry is baked?

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Re: Raspberry 4 burnt? How to know

Sun Dec 01, 2019 11:06 pm


If you shorted your pi4 to a 127V AC supply its almost certainly dead, the red LED only indicates that it has a 5V supply,

the lack of a flashing green LED would indicated the pi is not trying to read the SD card and not trying to boot.

Before you replace your pi I would insulate all AC mains connections to your power supply or next time it might be you that goes pop and stops working.
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Re: Raspberry 4 burnt? How to know

Wed Dec 04, 2019 9:44 pm

Learn from this costly mistake
Consider getting your new RPi4B a non-metallic case
also never make any physical wiring connections when the board is powered
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

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Location: UK

Re: Raspberry 4 burnt? How to know

Thu Dec 05, 2019 11:08 am

It sounds like it's dead, but the definitive way to check is to measure the 3V3 output on pin 1 of the GPIO header with a meter. If it's not 3v3 or thereabouts it's dead.

Be grateful it's only the Pi which touched 127V and died, not yourself.

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