PanelDue Failure
-
Well,
mine does more like flickering/tearing over the whole image displayed its impossible not to seen this
Just to clarify - I have a screen that looked exactly like your video one day, and the next day looked nearly perfect. So if it was tested before shipment, it is possible it tested perfectly.
-
Ok i found something if i touch with 1 finger the back of the PCB from the display in the middle the issue is gone display just works perfect if i take the finger off its there again!
or if use just a small line of tape… -
Ahh sounds like a grounding issue…
-
Yea
maybe there is a small fix for it? 
just to make it clean there is nothing else connected to the duetwifi just:- external power 24V
- paneldue
thats all
-
Maybe I was holding it wrong.
www.engadget.com/amp/2010/06/24/apple-responds-over-iphone-4-reception-issues-youre-holding
But really the way I was holding it might have been the difference.
-
Just tested it, touching the vias on the backside of the LCD's PCB, right before the flat ribbon connector connected to the LCD itself, makes shimmer go away.
-
I've noticed that some 4.3 and 5 inch displays have black shielding over part of the ribbon cable. But I've never seen this on a 7 inch display. Maybe an insulated shield over the ribbon cable, or over part of the display panel, would fix it. I can't test this because both my 7 inch displays work perfectly.
-
Mayby Tony can test it
-
I'm seeing the same "ripple" effect with a brand-new 7" display ordered from "here", and I can confirm that touching the back side of the display PCB or the connector temporarily resolves the effect. Since I don't want to make my fingertip a permanent part of my 3D printer, what material would be suitable to add the shielding, grounding or whatever other effect is required?
-
The two 7" displays I have don't have this problem, so I don't know what works. You could try putting a piece of aluminium foil on top of the wide Kapton ribbon cable that connects the TFT panel to the PCB, and putting sticky tape over that to hold it in place and make sure it can't short against anything.
