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Elegoo Neptune 3 no longer turns on
(lemmy.world)
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this post was submitted on 05 Mar 2024
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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.
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)
Yeah, It sounds increasingly like there's something wrong with the hardware on the board. that may or may not have wrecked the firmware, but unless you can identify what went wrong, and have the skills and tools to deal with soldering in things... you'll need to get Elegoo to send you a new board. sorry I couldn't be more help.
And just to verify, that LED isn't normally on?
That LED is normally on. It's been about a year since I've had the chassis open so I can't recall if there are normally more than one on when it first boots up or if it's only the one. Looking at the diagram it seems like it's just a main power indicator.
Thanks for taking them time to respond. You may not have been able to fix the problem, but you've at least assured me there's no other troubleshooting steps I can take until I hear from Elegoo.
I guess my DnD players will have to live with quarters and pen caps in lieu of customized minis. Haha.
I found this diagram for V2.2 which looks the same. The lit LED is D5 which is the one you mentioned on the 3rd page. It looks like it only indicates that the 5V to 3.3V regulator beside it is working and has power.
That LED being lit at least more or less confirms that power is not the issue. Thanks for digging that up.