Is it normal for a touchscreen to crack on its own while sitting unused?

The lack of an external dent doesn't mean the screen wasn't stressed; in my expirience with these machines, that subtle, spider-web cracking often comes from internal pressure or flexing rather than a single hard blow. When these printers sit in a moving van for extended periods, they are basicly in a box that's constantly shifting. The weight of the machine, combined with the jostling and uneven movement of the van, can cause enough pressure to stress the internal display assembly even if the outer plastic shell looks fine. It's much more likely to be pressure-related damage than thermal failure, even though temperature swings are a known factor for electronics.

I've had two instances like this where the whole front fascia popped up a fraction of an inch, which defintely shifts internal components. Those touch panels are surprisingly delicate. On my last rebuild, I measured the internal mounting clip stress and found it was around 50 pounds of pressure when the chassis shifted. It's a known weak spot in the design of that specific touchscreen assembly. If you want to go down that route, checking the part number for the replacement screen is ussually the fastest path to getting a replacement under coverage.

I had a similar issue once, but mine was with the power cable just coming loose on the back. It was an older model, and the rubber housing just started fraying because it was always tucked behind the printer, so I never thought about the stress on the connectors. I wonder if the vibration while moving causes the internal ribbon cables to loosen too, or if it's just a material failure.

If it's not the impact, I guess maybe the way the printer was sitting on the trolley caused some kind of pressure right there on the display panel, even if the casing looked fine. It’s a bit of a mystery how small a shift can lead to a crack like that.

I saw one of these screens fail after a move but the issue wasn't the moving itself. It had moisture intrusion from poor sealing during a stop, which caused the adhesive on the glass to weaken. You need to look at the internal display harness to see if it's pulling too tight when the frame is set down. I found that sometimes the internal mounting clips just needed a tighter screw to stop the machine from flexing ever so slightly. That tiny shift can put too much stress on the display components.

I had a similar situation with a different model, but instead of a crack, the touch response just started dying slowly on one side. The printer was running fine, but the touch panel felt extremely unresponsive in specific areas. I ended up using a tiny piece of 91% isopropyl alcohol on a cotton swab to gently clean the bezel around the display. It was just cleaning, but after doing that, the dead zones became instantly clear. It made me think the internal ribbon cable was stressed or damaged near the connector, not just the glass itself. You should probly check that harness.