Anyway, just for an update, I've reach out to customer support as advised, provided them the necessary service tag and they've offered a repair/replacement.
I bought a Dell S3423DWC today and and found that the monitor remained dim. I was unable to adjust the brightness. Tested it with 2 different systems, 1 desktop and 1 laptop, with the same results. Tried factory reset with no difference.Any idea what is the problem?
S3423DWC, dim, unable to adjust brightness