I've just pulled my duemilanove board out of storage, and it works fine through USB. However, when I plug it in via the barrel jack, the PWR light just flickers dimly, and refuses to work. I've tried with several different wall-plugs, and now I'm stumped. Could anyone help me out?

Power Problems?

system March 19, 2012, 11:51am 3

The barrel jack is outputting 9v
The Vin pin (measured to ground) is 9v
The 5v pin (measured to ground) is 1.4v

Does this mean I need a new regulator? or is there something else which could have died?

Topic		Replies	Views
Duemilanove Power Frequently-Asked Questions	11	5428	May 6, 2021
Arduino Duemilanove with broken power switching circuit IDE 1.x	4	1256	May 5, 2021
5V gives 3.5V is board broken? :( Frequently-Asked Questions	24	10183	May 6, 2021
detecting power with Duemilanove Syntax & Programs	6	970	May 6, 2021
Duemilanove not running with external power supply Troubleshooting	26	6428	May 6, 2021