Hi,
Apologies for this question, it must have been answered a thousand times but I haven't been able to track it down yet.
Total newbie.
Have succesfully played with Nanos and recently got a UNO rev 3 with the VERY small processor chip because I want to use a motor shield. Been unable to get a chip number, it is so small that I can't give you the number on it even with magnifier.
Plug it in. Get the ding-dong (COM4 is there) and the power LED glows red. There seems to be NO L13 led!
THEN absolutely nothing happens. I can't write a bootloader to it (tried 3 different ones and various programmers. Keep getting "Error while loading bootloader" and "Error: Could not find USBtiny device (0x2341/0x49)" from avrdude. Can't write ANY sketches to it, same error msg.
Have searched all avenues, can't find other solutions. I am running WIN 10. Powering it through the USB port, nothing connected to it.
Is it simply a dud or am I going about it the wrong way???
This is all a very steep learning curve for a 75 year old so ANY help will be appreciated.
Aussiewill
Hi, mate.
Did you get it going?
Tom.. 
Sorry, have been away.
Problem as above, here is the error coding (sketch is the standard "blink".
Arduino: 1.8.4 (Windows 10), Board: "Arduino/Genuino Uno"
Sketch uses 928 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM4 -b115200 -D -Uflash:w:C:\Users\Tina\AppData\Local\Temp\arduino_build_907056/Blink.ino.hex:i
avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : COM4
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xd1
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xd1
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
The UNO DEFINITELY has the CH340 chip.
IDE is set to Genuine Arduino UNO
Anything else I'm missing or could try???
Thanks
Aussiewill
Make sure you are not using a USB 3.0 port would be my first guess.
Try a different USB cable is always a good thing to do at this stage.
Have NOTHING ELSE connected to a board (not even external power) is the other common issue JIC its not wired properly or uses pins 0 and 1.
A decent picture of the board would be useful to those trying to help you in case it is CH340 based or similar.
If it is then installing the CH340 drivers from here with ADMINISTRATOR status would be another thing to try.
Hi,
In the IDE, with the controller connected, select TOOLS, Get Board Info.
What comes back?
Have you got another controller to try with uploading blink?
Tom... 
Hi,
Thanks for the input.
It IS 340 based, but so is the other one and I'm using the CH340 driver which works.
As for the other question: When I try for board info I get the message along the lines of " can't access (or communicate) with board.
Other (CH340 based) UNOs work fine.
And finally, I don't have a USB 3.0 port. Only USB 2.0
Aussiewill
A CH340 based board would normally show the following.
If you cannot get that far there is quite a good chance it is a dead board in some way.
Do you have any background as to what or how anything may have been connected that might have caused a short or something similar ?
Hi
Thanks again for trying.
No, I don't even get that info, which I DO with my other UNO board.
Nothing has ever been connected to it.
I have USB 2.0.
It definitely IS CH340 (I got a bigger magnifier).
And yes, another USB cable was about the first thing I tried.
I think it may just be a dead board and I'll see if I can get the supplier to replace it.
Many thanks to all for their efforts.
Aussiewill