>It would be very helpful to know what is causing this behavior
Some 'marginal' chips have slipped into the production line
Myself, it has a marginal power chip, if it doesn't get VERY clean power
the red led just blinks,, and I am ONLY talking 1V ripple
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The red led is connected to 5V line, when it blinks you have 5V, 0v, 5V, 0v ...and so on
And obviously,,NOTHING happens,..... it's dead Jim
When I connected to bench PS it ran fine, down to 7V and a day at 13V
Nearly all bricks had too much ripple, about the 4th or 5th brick was OK
Some 'marginal' chips have slipped into the production line
Myself, it has a marginal power chip, if it doesn't get VERY clean power
the red led just blinks,, and I am ONLY talking 1V ripple
----
The red led is connected to 5V line, when it blinks you have 5V, 0v, 5V, 0v ...and so on
And obviously,,NOTHING happens,..... it's dead Jim
When I connected to bench PS it ran fine, down to 7V and a day at 13V
Nearly all bricks had too much ripple, about the 4th or 5th brick was OK