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Elegoo Neptune 3 no longer turns on (lemmy.world)

submitted 8 months ago* (last edited 8 months ago) by [email protected] to c/[email protected]

32 comments fedilink hide all child comments

Hi all. Yesterday, my printer stopped responding to commands from the touch screen, so I shut the printer off and turned it back on. Now, the printer and screen turn on (power fan spins and screen backlight comes on), but the screen does not display anything, and the printer cannot be reached via USB. Multiple power outlets and cables have been tried, and all cables inside the main chassis are securely connected except for the Z- cable (which has been replaced by a BLTouch). There is a single red LED on the motherboard that lights up when the machine is powered on. Does anyone have any ideas how I can try to diagnose this? I've sent an email to elegoo, but I've heard it can take weeks to get a response, and I'm trying to get things ready for a DnD campaign starting this weekend.. thanks for any tips.

Edit: for anyone finding this post looking for help, you're SOL. Elegoo responded to me, and after sending them a couple pictures, they've determined my motherboard to be dead, and are not willing to provide a free replacement since I'm just outside of warranty. Now I'm torn between getting a new motherboard (waiting on a quote from them) or just saving for a better printer.

Edit 2: after some very light complaining, Elegoo is making right and sending me a new motherboard free of charge.

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[–] [email protected] 1 points 8 months ago (19 children)

I also suspected a firmware issue but hadn't yet tried anything. I just loaded the stock firmware on to an SD card and still no response from the printer.

I managed to find a circuit board diagram for what I believe is my main board. There are several indicator LEDs, but I think most of them are for indicating that a heating element or fan is turned on, I only see one LED in the diagram that looks like it should be on with the printer.

I've just tried completely disconnecting the BLTouch and reconnecting the stock cables. No change in behavior.

Photo of mainboard

Note that in this picture the nozzle thermistor has been disconnected, but the behavior is still the same.

[–] [email protected] 1 points 8 months ago* (last edited 8 months ago) (18 children)

When you flashed the firmware, did it do anything to show that it was taking the firmware?

either way, I'm thinking you'll have to get help from Elegoo- either instructions to clear it, or a new board. Apparently, though there's two boards in those printers that need flashing. (the main board and the LCD touch screen.) Unfortunately, I can't find any resource online identifying what the LED's indicate :/

EDIT:

So I found MKS's github, which seems to have things for the board here, but i'm not seeing any board hardware stuffs that match a Robin Nano_DW v2.1

[–] [email protected] 1 points 8 months ago (17 children)

I was unable to flash the firmware. Putting the SD with the stock firmware does nothing to alter the behavior. It's still just a blank screen with the backlight on.

Here's a link to the PDF I found of the board's schematics, if you're curious. The LED that lights up for me is on the 3rd sheet. All the others are connected to the hotend, bed, fans etc.

[–] [email protected] 1 points 8 months ago (1 children)

According to elegoo's firmware instructions, the screen itself has updatable firmware too. Maybe you could try updating that as well

[–] [email protected] 1 points 8 months ago

Thanks, I had forgotten about the screen firmware. Unfortunately, I just tried that, to no avail.

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