Please could anyone offer me advice on how I would go about restoring full functionality to my arduino? I recently bought a kit and built a reprap prusa i3 but since I did not have any previous experience assembling electronics I got an arduino mega 2560 pre-assembled. While clearing an initial blockage I must have damaged the board as the hotend would no longer heat once everything was hooked up again. After some investigating I found out it was possible to make a change to the firmware and have the hotend powered by the D9 sockets instead of D10. Everything has been working since then but it is at the expense of the fan that was previously located at D9. I would really like to get the hotend functioning from D10 again so I can use the fan to help with print quality. I just dont know how to go about locating and repairing the problem. Any advice with this would be much appreciated as I'm worried I could end up causing more problems attempting to fix it on my own. Thanks https://reprap.org/forum/read.php?1,230644,230644#msg-230644 Fri, 11 Sep 2026 13:24:35 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,230644,231276#msg-231276 https://reprap.org/forum/read.php?1,230644,231276#msg-231276 ml190 General Tue, 30 Jul 2013 17:51:31 -0400 https://reprap.org/forum/read.php?1,230644,231271#msg-231271 https://reprap.org/forum/read.php?1,230644,231271#msg-231271
Arduino ATMega328 microcontroller bootloader UNO

while looking around I saw this as well
RepRap Ramps 1.4 Fan Extender

would this be a good way around the problem or would it be better to repair the board?]]> ml190 General Tue, 30 Jul 2013 17:36:49 -0400 https://reprap.org/forum/read.php?1,230644,230951#msg-230951 https://reprap.org/forum/read.php?1,230644,230951#msg-230951 lajos General Mon, 29 Jul 2013 18:32:06 -0400 https://reprap.org/forum/read.php?1,230644,230882#msg-230882 https://reprap.org/forum/read.php?1,230644,230882#msg-230882
I think I might have poorly described the problem - the socket itself seems fine I just cant get any current to flow from D10.

Everything else functioning correctly and no sign of external damage leads me to think the problem is somewhere else on the board.
Maybe a fuse or other component directly linked to D10, does that sound sensible?]]> ml190 General Mon, 29 Jul 2013 13:38:03 -0400 https://reprap.org/forum/read.php?1,230644,230695#msg-230695 https://reprap.org/forum/read.php?1,230644,230695#msg-230695 D10 is soldered on both sides of the board therefore would need a de-soldering station to remove the socket efficiently - I wouldn't fancy using a manual solder sucker. Having said that, it can be removed I would think, if you break up the socket's plastic shell to (hopefully) get to the pins for removal - If you fancy the job that is!]]> waitaki General Mon, 29 Jul 2013 01:10:56 -0400 https://reprap.org/forum/read.php?1,230644,230644#msg-230644 https://reprap.org/forum/read.php?1,230644,230644#msg-230644
I recently bought a kit and built a reprap prusa i3 but since I did not have any previous experience assembling electronics I got an arduino mega 2560 pre-assembled.

While clearing an initial blockage I must have damaged the board as the hotend would no longer heat once everything was hooked up again. After some investigating I found out it was possible to make a change to the firmware and have the hotend powered by the D9 sockets instead of D10.

Everything has been working since then but it is at the expense of the fan that was previously located at D9.

I would really like to get the hotend functioning from D10 again so I can use the fan to help with print quality. I just dont know how to go about locating and repairing the problem. Any advice with this would be much appreciated as I'm worried I could end up causing more problems attempting to fix it on my own.

Thanks]]> ml190 General Sun, 28 Jul 2013 18:20:04 -0400