[Solved] Partial Power after assembled  

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John Doe
(@john-doe-5)
Active Member

It's finally built after too many hours but when I turn it on the only lights that come on are 2 little green lights from inside that messy cable/Motherboard box.  I don't even know where to begin because it would seem all the cords are in place but I can't be sure because the cable management ended up being a messy nightmare.

Posted : 04/05/2021 4:27 am
John Doe
(@john-doe-5)
Active Member

Posted : 04/05/2021 5:17 am
John Doe
(@john-doe-5)
Active Member

I've rechecked the cords a third time.  It would seem despite the mess, everything is where it should be.  The grounds all seem secure, the cables are all slotted in where they should be.  I can't figure this out.

Posted : 04/05/2021 5:58 am
Dan Rogers
(@dan-rogers)
Prominent Member

Do go to the on-line manual and look at the place where all of the plugs go.  the green lights mean it's alive.  I think you did not tell us what is not working.  Is there no function on the control panel?  That's just one set of connections so you might want to start there.

Posted : 04/05/2021 7:15 am
John Doe
(@john-doe-5)
Active Member

@dan-rogers

Yeah, the control panel has nothing going to it.  The only sign on life my printer has is those 2 green LEDs.  I checked the connections on those LCD cables and they seem to be secure and slotted in the right places.  I hope they weren't damaged, I tried not to tighten the zip ties too secure for fear of deforming them.

Posted : 04/05/2021 7:24 am
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(@)
Illustrious Member

It was common for builders to reverse the LCD cable pair.  But there are other things that can go wrong. Fuses blow due to crimped wires at the bed heater, crimped wires in the extruder bundle, spade lugs not placed properly on the power terminals, etc. Even a motor plugged in to the wrong socket can cause odd issues. 

But start at the LCD cables ... that one black -- two black mark difference is important. At BOTH ends.

https://help.prusa3d.com/en/guide/6-lcd-assembly_172423

https://help.prusa3d.com/en/guide/8-electronics-assembly_174100

This post was modified 2 months ago 2 times by --
Posted : 04/05/2021 7:40 am
cwbullet
(@cwbullet)
Illustrious Member

@john-doe-5

That is one rats nest of wires.  

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Chuck H
3D Printer Review Blog...
Posted : 07/05/2021 9:45 pm
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