LCD would no long come on
Hi all, I currently own a Prusa I3 1.75mm. I finished assembling the kit and decided to followed the steps in the instruction to calibrate the printer. I turned the printer on and everything was fine, the temperatures are both at 30C. I chose the preheat option and selected PLA. Then, I think I saw a flash and the LCD went black. Now, I cannot get the LCD/ the printer to come back on. Please help, I really have no idea where to go from here. Thanks
Re: LCD would no long come on
Hello Tut!
Have you looked in the Rambo box and see if the lcd cables are firmly attached to the board?
/Henrik
Re: LCD would no long come on
Dear Mr.Henrik,
I tried unplugging it and plugging it in again to make sure it's not loose. I also looked at the fuse to make sure they are not blown out. Do you have any other idea as to why? As I stated, I think I might have blown/ short something after I initiate the preheat command.
Thanks,
Tut
Re: LCD would no long come on
There are 2 5 Amp fuses on the controller board and 1 15 Amp fuse.
One of the 5 Amp fuses is used for the electronics, but you cannot always tell if it has blown by just looking at it. Use a continuity tester is you have one to check all the fuses on the board.
There is also a fuse on the power supply housed within the mains power socket. Also check that fuse.
There is a remote possibility that you have a faulty PSU, but all this would be a lot easier to check is you have access to a multi-meter.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: LCD would no long come on
a shortage at the +5V, maybe due to a defective or wrong attached y- or x- endswitch may cause the same.
standard procedure to find such problems:
unplug every device from the rambo board, except the power supply.
does the onboard leds show any activity ? does the printer respond when you connect them through USB to your PC (use pronterface to monitor any response, connect with 115200 bit/s) ?
if so, proceed with plugging in the lcd connectors and proceed with the other devices (endstops, p.i.n.d.a., heatbed, hotend, thermistors, steppers etc.).
dem inscheniör is' nix zu schwör...