No longer able to upload - avrdude: stk500_paged_write(): (a) protocol error, ex

Hello all,

I'm sure i've read every related article/post on this but still stuck. I have a VERY simple setup that is NO LONGER alowing me to upload. I'm praying i have not somehow damaged my device!

Trying to upload 'BareMinimum' example but seeing this error:

'Binary sketch size: 466 bytes (of a 32,256 byte maximum)

avrdude: stk500_paged_write(): (a) protocol error, expect=0x14, resp=0x64
avrdude: stk500_cmd(): programmer is out of sync'

Holding down shift when pressing upload button i get this error:

Binary sketch size: 466 bytes (of a 32,256 byte maximum)
avrdude: usbdev_open(): did not find any USB device "usb"

Here are the details of my setup:

Windows 7 operating system (32 bit)

Using Arduino Uno board R3 with ATMEGA328P

Nothing connected to Digial pins 1 or 2.

Bootloader appears to be active as LED connected to 13 flashes when performing reset

UNO board seems to TX/RX data (due to flashing LED's) but IDE eventually times out and shows error listed above

Tried all USB ports and all manor of power resets

Checked all COM ports and drivers are correctly installed (even tried other USB cables!)

Hope some of this can help!

There is a lot of threads about this, can you try generic solutions, loopback test, check RX leds, etc? and report that to narrow the problem.

Thanks,

I'll try that and report back - this guide is what i was looking for all along.

I think the name 'loop back' is a bit misleading as i thought it was a coding related topic so never read the thread.