Instrument Cluster showing worm/spider on LCD display of speedometer

[KevinH1990]

Originally Posted by clickman

I heated the interior from around 8am to 11pm (didn’t check temp). The worms slowly - very slowly - disappeared. It took around a week. During this process, overnight, while the heat was turned off, the worms would rebuild somewhat. Apparently once a pixel is stuck, it’s easier for the ones adjacent to do the same, hence the creation of what looks like worms.

This is a valuable piece of information. Over 10-years ago, I installed a Carrera gauge cluster in my Boxster. https://986forum.com/forums/boxster-general-discussions/43017-carrera-gauge-swap.html

The cluster I used had damaged pixels which enabled me to buy it for about $150. (I think the seller was a Porsche dealer technician who obtained the cluster when it was replaced under warranty.) The damaged pixels were located on the clock/oil lcd screen beneath the fuel and temperature gauge on the right:



I had seen threads that suggested heat was a potential remedy. I spent several hours warming the damaged gauge face with a hair dryer and stored the cluster inside for a few days. I didn't notice any improvement.

I'm wondering whether heat is effective on certain patterns of damaged pixels, (e.g. long thins strands of defective pixels) and not on others. On the cluster I bought, the damaged pixels formed a dense group that made up a fairly large blotch. Perhaps the shape of the blotch prevented efficient heat transfer from "recovering" pixels to the adjacent damaged pixels. Put another way, if a recovering pixel was adjacent to only one damaged pixel, the heat transfer would be greater than if the recovering pixel had to share heat with several adjacent damaged pixels.

[clickman]

Originally Posted by KevinH1990

I spent several hours warming the damaged gauge face with a hair dryer and stored the cluster inside for a few days. I didn't notice any improvement.

Insufficient intensity and time. As I suggested, think of the heat inside the sealed cab with the summer sun.