Unable to connect Rumba Board to PC

[Thomas.P]

Hi,
I just purchased a new Rumba board a few days ago, I uploaded Marlin to it and everything was working fine.
A few days later, I decided to upload a modified version of Marlin but i couldn't get to connect the Rumba with my PC (the light Tx and Rx stayed "on" all the time).
I tried to set the power jumper in "USB powered" position, then placed a jumper slightly on the two pins Reset and Ground, connect the USB (the Tx and Rx light was off) but when i took out the jumper from the reset, the les Tx and Rx came back continuously on.
I tried with different USB cables (i have another Rumba board which is working just fine with my computer and the same usb cable) and i even tried to solder a new cable to the 4 pins usb next to the mini usb without any luck...
I'm out of idea , so if someone could help me, i would be very greatfull!
Thanks!

[William]

Hi,in your case,there may have some problems with the driver,so please try to re-install it.If it still don't work,could you sent some videos showing the detail of you problems?It will be more helpful to solve the problems.

[Thomas.P]

Thank you, I tried, but it's not a problem of driver (works fine with my other Rumba), this is not my video but it's the exact same problem :
https://www.youtube.com/watch?feature=y ... pp=desktop
I've read that i should try to use the ISP port in order to see if my CPU has died or not, will try it out

[wovenrug]

I am having the same issues.
Rx/Tx lights are on constantly , Win10 and Win7 machines wont recognize it. Won't go into dfu mode.

[William]

Hi,when you pull out the jumper cap in the position of picture,the MCU will be changed into Mode DFU.

[wovenrug]

Doesnt work on my board. wheb you put the cap on those pins rx/tx lights go off. Wheb you remove the cap both come back on. windows can not reconize it.

[Thomas.P]

I've been able to upload Marlin through the ISP port of the ATMega 2680. You'll need another Arduino, I did it with a cheap Arduino Uno i found on Amazon, worked fine.
It's explained on this page : http://www.gammon.com.au/forum/?id=11635
I think if you'd bootload the ATMega 16U2 (and it isn't fried) your USB might come back to life (but I really am not sure! I didn't have the time to try it out myself).