HP22S LCD Problem

[cruff]

(10-01-2021 10:31 AM)isanchez Wrote:  It seems that there are two layers in the inner side of the display: the mentioned silvered one you have to peel off, as this is the source of the dark eliptical stain; and another transparent one, below, difficult to see, that HAS NOT TO BE REMOVED, as it provides some kind of relective properties to the LCD display. If this layer is removed, the contrast of the display is lost.

That transparent layer is a polarizing filter, and as you say if it comes off the contrast will not be good. You could probably obtain some polarizing film to replace it.