uno r3 not sending usb identification any more

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hello got strange problem.

my uno r3 not connect computer more, neither identifies android app witch supose pop open when connect arduino uno. tripple checked driver on windows "unknown device".

the curious thing is, script on run becaulse connected led , light @ pwm of 1. had running on 12 v adaptor, read in manual take 20v thou 9 12 recomended. discovered problem when half connected ecs connector recalibrate it. planned plug motor in vin becaulse have done lot of times , worked fine.

from see chip works.. how not communicate usb more.. tx rx don't light other lights normaly , said led @ port 3 to.

any 1 know hase gone wrong. or how fix it?
thanks bram

hi bram,

if using arduino under windows, try go "device manager" (start->computer(right click)->device manager) , in ports. if arduino detected , has port (comx). try uninstall or, first, disable it. can manage option right click in arduino device.

good luck!


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