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I'm using a USB 7 port hub that's rated 5V at 3.0A and get a lightning bolt symbol in Raspbian. There's nothing else plugged into it.

Shouldn't this work?

Thanks

user1598226
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2 Answers2

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Your PSU isn't powerful enough. Try the official Raspberry Pi PSU. Also try plugging in a power adaptor to your USB hub if it has a jack.

James Young
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Lightning bolt means undervoltage.

Measure the voltage you're getting out of your hub (with a multimeter, USB charge monitor, whatever) and on the power pins of your RPi. Either your hub is not supplying a high enough voltage, or your cable is bad enough to drop the voltage on the RPi side.

Also, a "3A" label doesn't magically turn a bad power supply into a good one.

Dmitry Grigoryev
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