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LCD not working on newly built MK3S  

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Blake
(@blake)
Active Member
LCD not working on newly built MK3S

Finished the build of my MK3S and after turning on the power supply, the LCD does not turn on at all.  I have confirmed the connector placement and even swapped cables just in case.  Any other ideas? Not sure if it is a ESD issues or if I tighten the screws too much installing it in the plastic.  HELP!

Posted : 12/12/2019 9:20 pm
rmm200
(@rmm200)
Noble Member
RE: LCD not working on newly built MK3S

Contact Support. EShop above, log in, and Chat button in lower right.

They are responsive and will step you through it.

Don't bother sending EMail - it may be years before you get a response.

Posted : 12/12/2019 9:37 pm
Ken G.
(@ken-g)
Eminent Member
RE: LCD not working on newly built MK3S

Out of curiosity, when machine powers up, do the fans come on? motors move, or is it just dead? If dead, check power supply cables.

Posted : 12/12/2019 11:19 pm
Blake
(@blake)
Active Member
Topic starter answered:
RE: LCD not working on newly built MK3S

@magician-144

When turning on the power supply, the only thing that happens is a red led on the board turns on. No motors moving, fans blowing or LCD.  I'll double check all cables and report back.

Posted : 12/12/2019 11:29 pm
Blake
(@blake)
Active Member
Topic starter answered:
RE: LCD not working on newly built MK3S

Double checked all cables and it everything looks fine.  Took off the LCD Ribbon cables and stretched them out as recommended and still no luck.  Board red LED light turns on but LCD screen has nothing on it.

Posted : 13/12/2019 3:54 am
Daniel-J
(@daniel-j-2)
Active Member
RE: LCD not working on newly built MK3S

If you've done the right thing, maybe something defective. Contact technical support and send them photos with descriptions. This should help.

Posted : 13/12/2019 8:00 am
Ken G. liked
Blake
(@blake)
Active Member
Topic starter answered:
RE: LCD not working on newly built MK3S

They are sending me a new LCD.

Posted : 13/12/2019 2:00 pm
Ken G. liked
rmm200
(@rmm200)
Noble Member
RE: LCD not working on newly built MK3S

I really can't fault the Chat support guys. They don't always agree with me - but they are both fast and responsive.

I just wish Prusa would hire someone to handle EMail.

Posted : 13/12/2019 5:16 pm
Blake
(@blake)
Active Member
Topic starter answered:
RE: LCD not working on newly built MK3S

Without a working LCD can I still attach my laptop via USB to confirm the main board is at least working properly?

Posted : 13/12/2019 5:20 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: LCD not working on newly built MK3S

Hi Blake, 
that largely depends upon whether the internal RasPi interface is turned on, or not... 

If the internal Raspi interface is off, the serial connection should work. using Prontaface or and external Raspi connected with A USB cable. 

 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 13/12/2019 6:44 pm
Ken G. liked
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