hello i think there is a short circuit in my Geeetech Sanguinololu Controller board for RepRap Prusa I3 MK8.
I have a geeetech prusa i3 Aluminium from august 2016
And i have done a few prints on it so far. But suddenly it just broke...
When i turn on power, my lcd just show black squares.(all fans spins normal) But it kills my computer. (black screen an it needs do be restarted) thats why i think it maybe sends 12v in usb cable
If i connect only usb to board, lcd works normal and i can connect in repetier-host. so firmware and the rest on the board is ok i guess?
I have disconected every cable and stepper drivers connected to the board exept power in and lcd. I have checked backside of the board to see if anything was shortcircuting.
I have checked v input 11.95
What is wrong??
maybe short circuit in my Sanguinololu board?
Re: maybe short circuit in my Sanguinololu board?
1.When you turned on power,did you also plug the USB cable?(cuz you said it kills your computer.)
2.Connect only usb to board,lcd works just suggests the lcd is good and you can't do any heating.
3.When you just leave the power cable and LCD plugged,did the lcd work when you turn on the printer?
More details like pictures and videos would be appreciated.
2.Connect only usb to board,lcd works just suggests the lcd is good and you can't do any heating.
3.When you just leave the power cable and LCD plugged,did the lcd work when you turn on the printer?
More details like pictures and videos would be appreciated.
-Keep your mind and try to test it. 
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!
Re: maybe short circuit in my Sanguinololu board?
1. Yes it happened while checking the nozzle for flow just before starting a print. Qfter that I turned to the computer and then it was black, and also the lcd. So i shut my printer off and restarted my computer, then when trying to do a new atemt i hae my usb connected and the lcd worked again so i turned on power, and it killed my computer and black square lcd again. I have now measured how much power there is in my usb cable while having it connected to the board with power on. And it shows 9.5v and isn't a USB cable supposed to sen 5v? So i guess there is something that has broken on the board when converting 12 v down to 5...
2 yes
3 no
Pics can be posted later
2 yes
3 no
Pics can be posted later
Re: maybe short circuit in my Sanguinololu board?
OK,so your "lcd" means the screen of your computer NOT the LCD panel on the printer?
Have you tried printing it with a SD card?How did it go?
Have you tried printing it with a SD card?How did it go?
-Keep your mind and try to test it.
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!
-Everything will be fun！-Support all Getech printer.
-You can ask me the questions and I will kindly reply.
-Respect others is the best way you can get help!
Re: maybe short circuit in my Sanguinololu board?
By lcd i ment LCD panel.
LCD panel is not working if i turn on power. Only black squares.
only time LCD panel is working is when only usb is connected to the computer. (Not power conected to 3d printer)
LCD panel is not working if i turn on power. Only black squares.
only time LCD panel is working is when only usb is connected to the computer. (Not power conected to 3d printer)