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MY Pi 4 won't boot anymore after I connected a Sabrent HB-UMP3 powered USB Hub. The Pi4 had been running just fine for around 2 years, yesterday I hotplugged the abovementioned hub and the Pi immediately stopped responding. I disconnected the hub and tried to reboot - to no avail. Not even the splashscreen and bootloader text are displayed, the TV connected via HDMI also does not detect any input. When connected to power, the Pi's red power LED lights up and the green LED next to it briefly lights up then turns off. Ethernet port LEDs light up when a cable is plugged in. Apart from that, nothing happens, no response to ping.

Any ideas how to resurrect it ?

Many thanks.

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    Does this answer your question? Raspbian fails to boot after fresh install
    – joan
    Sep 26, 2022 at 14:07
  • Treat it as a boot failure and look through the many related questions.
    – joan
    Sep 26, 2022 at 14:07
  • That "duplicate" is substantially different from this question.
    – goldilocks ♦
    Sep 26, 2022 at 15:40
  • Welcome -- what happens when you plug it in with no SD card (particularly with the green ACT led).
    – goldilocks ♦
    Sep 26, 2022 at 15:40
  • @goldilocks "what happens when you plug it in with no SD card (particularly with the green ACT led)": I used an external SDD to boot, so no SD card to start with. The green ACT LED very briefty lights up then stays off.
    – Blindfreddy
    Sep 27, 2022 at 7:24

2 Answers 2

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Boot problems are frequently asked questions.

A comprehensive boot problems sticky is available at the Raspberry Pi Foundation forums.

If the sticky does not solve the problem the Pi is effectively dead.

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I used an external SDD to boot ... The green ACT LED very briefty lights up then stays off

I've never booted with an external drive, so I don't know if there is a change in the behaviour of the ACT led, but normally with no SD card in it should light up and stay on.

If that was the previous behaviour (ie., it's not the same since the incident), this is probably further evidence pointing to the conclusion that the Pi is defunct.

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