Firmware loading issue

[karter59]

Hi all,
I had a search through the board but didn't find anything relevant to this problem.
I've had my Rostock Max V3 running for over a year without any problems. I decided to do some upgrades. Main upgrade is to the .9 degree stepper motors. I modified the firmware in the Arduino IDE. I sent the clear eeprom sketch to the Rambo fine. When I attempt to send the firmware sketch, It fails. I turned on verbose output on the loading. It does the read of the board fine but then it comes up with "Writing | avrdude: stk500v2_ReceiveMessage(): timeout
It repeats this 6 more times then reports "avrdude: stk500v2_getsync(): timeout communicating with programmer"
These reports start over again for 3 more cycles then it comes up with "An error occurred while uploading the sketch"
Any ideas on what I'm missing?

Roger

[rootboy]

The "solutions" for this are all over the map. https://forum.arduino.cc/index.php?PHPS ... =135451.15

But I would try a different PC to do your programming for starters.

[karter59]

I had tried all of those suggestions and more before posting. Today I programmed another control board (a Azteeg X3 Pro) with no issues with the file that I was trying to upload into the Rambo. I then removed the Rambo from the printer to look for any obvious issues with it but nothing.
I did notice today that if I don't have external power to the board, even the clear eeprom sketch won't upload.

[rootboy]

I would try re-flashing the bootloader next.

[karter59]

Tried burning the bootloader today. Completes the write but then fails on the verification. I tried to then upload firmware in case the affected area of flash isn't used. Write ends up failing. I think the board is toast.

[rootboy]

It doesn't sound good...

And it's got the surface-mount 2560, which if you aren't set up for it, is pretty hard to replace.

Edit:

The problem could also be in the ATMEGA16U2-MU, but you'd be in the same boat soldering-wise.

These are just standard Arduino 2560's right? If so, get a new one from eBay and pop your old shield onto it.