Board doesn't turn on with power-only USB

CCHS-Melbourne / iotuz-esp32-hardware

Project for the InternetOfTuz (LCA2017 Open Hardware Mini-Conference)

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Board doesn't turn on with power-only USB #51

Open ghost opened 7 years ago

ghost commented 7 years ago

Not sure if that's the correct title - I mean that the board won't turn on (screen remains off) if I plug the board into a USB charger with no battery inserted.

Plugging it into a PC or laptop works fine

rdpowers commented 7 years ago

There's nothing special about the data lines, so I suspect your USB charger or the on-board USB connector.

Do you have a DMM/voltmeter?

What I would first do is check the 5V line when you have plugged it in by the charger. Is it near 5V? If you wriggle the connector does the power LED come on, even briefly (the switch will need to be in the ON position)? Does another charger work?