Hi,
When you installed the new display, were you sure the optic connections were clean, tight, and not bent?
As far as the issue, this unit receives signals via the can-bus. CAN stands for controller area network. Basically, all the computers/modules are tied together via a few wires. If everything is properly attached and in good condition, I recommend having the can-bus scanned for codes. If there is a code stored, it will identify it regardless of the module.
Here is a quick video showing it being done:
https://youtu.be/u-4syLc-ifQ
By scanning the system, it should point us in the right direction. If it isn't done, then it becomes a guessing game. That usually leads to money and time lost.
If you take a look at the attached pic below, it identifies possible concerns.
Let me know if this helps or if you have other questions.
Take care,
Joe
See pic below.
Image (Click to make bigger)
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Thursday, September 16th, 2021 AT 8:54 PM