LCD going black and flashing white occasionally after boot
 
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DavidBanni
(@davidbanni)
Member
LCD going black and flashing white occasionally after boot

Hi,

I built my kit and printed a few items. Next time I boot the screen failed half way through the boot progress.

I flashed the firmware up to 5.1.0 and I booted successfully. Started the printer later that day to do a print and the screen was black again after boot.

Today I tried to use it and I got to the home screen, but then navigating to Filament it went black again.

This inconsistency is really frustrating, is there a fix?

Thanks,

David

Posted : 28/11/2023 9:10 pm
DavidBanni
(@davidbanni)
Member
Topic starter answered:
RE: LCD going black and flashing white occasionally after boot

The UI also froze trying to unload filament mid-print, but that's presumably a separate bug.

Posted : 28/11/2023 9:11 pm
colbymg
(@colbymg)
Member
RE:

Any resolution? I think I have the same problem (though mine is a MK3.9 upgraded from MK3s):

Screen flickers between black and white, sometimes when I scroll it'll display the icons and options selected but then sometimes go black/white again, sometimes will display options upside down.

Tried resetting to factory and installing a fresh 5.1.2: worked perfectly on next boot, but then problem resumed for all subsequent boots.

It started pretty randomly... The only thing I remember doing differently around that time was assigning the printer a dedicated IP in my router (kept giving itself new IPs every so often, which made PrusaLink and the length of the uneditable password a real pain). But I undid that setting and it still has issues.

Prints totally fine once I luck into getting to that point.

Figure next step is to unplug and replug all the LCD cables, then contact support.

This post was modified 2 months ago 3 times by colbymg
Posted : 04/01/2024 11:31 pm
ironfan72
(@ironfan72)
Trusted Member
RE: LCD going black and flashing white occasionally after boot

I'd definitely recommend you take some videos the next time it happens and contact support. I had this happen to me and a new LCD fixed the problem.

Posted : 05/01/2024 5:45 pm
DavidBanni
(@davidbanni)
Member
Topic starter answered:
RE: LCD going black and flashing white occasionally after boot

Hey,

I had the PE cable on the lcd in the wrong orientation.

Posted : 05/01/2024 7:19 pm
colbymg
(@colbymg)
Member
RE: LCD going black and flashing white occasionally after boot

Some video:

K, will do, thank you

Posted : 05/01/2024 7:51 pm
BM
 BM
(@bm-2)
Active Member
RE: LCD going black and flashing white occasionally after boot

Same probleme here with my mk3.5... I will contact the support.

Posted : 20/02/2024 8:50 pm
colbymg
(@colbymg)
Member
RE: LCD going black and flashing white occasionally after boot

Update on my experience:  

I tried updating the firmware, downgrading the firmware, replugging the LCD/board cables, resetting to factory settings (all with support's support).  
Resetting to factory settings seemed the most promising at first - it'd work like normal for 2-6 startups, then issue would resume.  
After trying all that, support offered to send a replacement xLCD. It arrived a few weeks ago, I installed and wanted to give it a few startups to be sure it's still working, and it's still working perfectly.  
Always love interactions with prusa support (when unfortunately required) - they usually suggest things already tried, but are very persistent to solve the problem and I love how willing they are to just replace parts!

Posted : 21/02/2024 4:21 am
Zappes liked
drees nice
(@drees-nice)
Member
RE:

I have a very similar issue (MK4)

https://youtube.com/shorts/_OYCGT-OVJU?feature=share

Posted by: @colbymg

Some video:

K, will do, thank you

Ps; how do i integrate the yt clip as video instead of just the link?

Posted : 21/02/2024 12:57 pm
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