arduino uno rev3 wont find com 3 port

Development Tools IDE 1.x
1

please help was working one minute then the next minute i get the error code

This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
Arduino: 1.0.6 (Windows 7), Board: "Arduino Uno"
Binary sketch size: 2,456 bytes (of a 32,256 byte maximum)

processing.app.SerialNotFoundException: Serial port 'COM3' not found. Did you select the right one from the Tools > Serial Port menu?

at processing.app.Serial.(Serial.java:191)

at processing.app.Serial.(Serial.java:77)

at processing.app.debug.Uploader.flushSerialBuffer(Uploader.java:77)

at processing.app.debug.AvrdudeUploader.uploadViaBootloader(AvrdudeUploader.java:175)

at processing.app.debug.AvrdudeUploader.uploadUsingPreferences(AvrdudeUploader.java:67)

at processing.app.Sketch.upload(Sketch.java:1666)

at processing.app.Sketch.exportApplet(Sketch.java:1622)

at processing.app.Sketch.exportApplet(Sketch.java:1594)

at processing.app.Editor$DefaultExportHandler.run(Editor.java:2382)

at java.lang.Thread.run(Thread.java:619)
the serial port also is grayed out please tell me what to do and in the device manager the 'ports' selection dosent show up i have a windows 7

2

Have you checked replacing cable.

3

Where did you get the board from? Post a link.

4

used identical cord and the lights slowly dimmed but not with the cord that came with it and the other cord showed up on the computer for a second

5

OK, so do you get anything in device manager when you plug it in? Have you tried the Arduino driver package?

6

no ports selection in device manager where is the driver package?

7

See here for a starting guide to Windows.

8

none of the unknown device

9

Do you have unknown devices in device manager? If so post a screen print.

10

no

11

Does the board get power when it is plugged it?

Any noises made by the computer when something is plugged in?

12

ChilliTronix:
Does the board get power when it is plugged it?

Any noises made by the computer when something is plugged in?

Ok, I know this is an older post, but hopefully I can still get an answer, because I can't seem to find it googling the issue.

So, my Arduino UNO R3 is not recognized by Windows, the same exact problem as bocaj78 - "com3 not found".

Changing ports does nothing, restarting does nothing, changing cables does nothing. Does not show up in devices, unknown or otherwise, nor does it make a noise when connected.

It seems, based on forums/articles I've read that I have to reset the Arduino.

How do I reset an UNO R3? I tried jumping the reset pins, but it doesn't seem to do anything (see image: https://virtuabotix-virtuabotixllc.netdna-ssl.com/core/wp-content/uploads/2012/04/Uno-front-DFU-reset-1024x764.jpg)

Or if you have any other suggestions, I'd be more than happy to hear them.

Hopefully you can help, but thanks either way.

-Andrew Terpening

13

I suggest trying to connect it to a different computer and see if it is recognized. If it does not show as a device to the other computer, you may need to re-flash the firmware on the ATmega16U2 using an ISP programmer or another Arduino as ISP.