Comment on Elegoo Neptune 3 no longer turns on
FuglyDuck@lemmy.world 6 months ago
Do you have a picture? looking at images online, there’s… alot of LEDs on that board. There should be documentation somewhere saying what it means. (Not holding my breath on that documentation…)
since the LCD and fans turn on, it’s unlikely to be a power issue. (a bad PSU will usually either just not work; or work until there’s high draw and crap out on you.)
It’s unlikely to be a physical connection issue, unless there’s some sort of jumper pins for flashing fresh firmware, which might put int into a different mode for that. (i assume you weren’t doing that recently?)
I suspect something happened to the firmware; If you have a copy of the firmware, either the stock firmware or whatever you flashed last time it was working it may take a fresh firmware from the SD card. Personally, I’d hunt down what the board does during boot first and identify what that LED means.
if you can, also check the board for signs of physical damage, something may have shorted out, etc. if it’s hardware, you’ll need to work through Elegoo for replacements.
papalonian@lemmy.world 6 months ago
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.
FuglyDuck@lemmy.world 6 months ago
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.)
papalonian@lemmy.world 6 months ago
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.
VehicleTree@lemmy.ca 6 months ago
According to elegoo’s firmware instructions, the screen itself has updatable firmware too. Maybe you could try updating that as well
FuglyDuck@lemmy.world 6 months ago
nothing that says what it does.
(would that be too much to ask for… Elegoo? or whoever made that board. those LED’s cost money. It’s such a shame they don’t have a top level “troubleshooting” guide that lists what they do… /sigh)