BMW E38, E39 and X53 instrument clusters LCD pixel repair – DIY guide ↗
Vendor page with a video showing how to fix missing or dim pixels on the E38/E39/E53 cluster by replacing only the LCD with an aftermarket screen, rather than buying a whole cluster. Minitools says the job is for qualified people.
Vendor guide (sells the replacement LCD and tools). Applies to the cluster family; check your cluster code against the page's list.