I followed NippyNelmo's instruction for my pixelated display. Chopped up an eraser to about 2mm thickness,
and put between the rubber and ribon cable contact. My display now works 100% fine.
I have never seen ribon cable attached to a PCB directly. What a poor design.
I removed the clusters with my hands, but it takes a little bit of hard jerky pull because of four corner friction points. I pulled one side first and tried other side to make it easier. I do not think there will be a risk of breaking.
You may use a little test trick to identify the problem.
Remove covers till you can partly pull out the PCB or at least get access to the PCB, STILL CONNECTED.
Use a plastic pin to gently tap on various spots on the PCB, keep an eye on the lamps and pixels. If you can make lamps or pixels flicker when you gently tab on a connector, component or area of the PCB, you know its a loose connection, and where it is.
The most commen cause is "cold" solder pads ( including solder pads from connectors), secondly connector problems.
Use a solder iron to heat and add some tin on the pad, and make the tap-test again.
Your problem could very well be a "cold" solder pad under the ribbon cable.
Fortunatly still TV´s are made with leaded technology, so 90% of TV faults can be solved within 10 minutes with a plastic pin and a solder iron.
My 8 years old 100Hz Sony Trinitron TV did sometimes flicker for no reason. Removed the rear cover and taped on the PCB´s, it was a solder pad under a connector, adding some more tin on the pad with a solder iron solved the problem.
My 15 years old Hitachi TV had a similar problem 5 years ago, same procedure.
You dont have to be technician or have any diagrams etc, just a pin and a solder iron, make sure ALWAYS to have only one hand near the TV
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Original MB´s turn heads - pumped MB´s shakes heads