50PUS7303 very bright HDR-grey blacks
I have the Philips 50PUS7303 set. Whilst the TV has good blacks in SDR, things get complicated in HDR mode. particularly in the native Netflix app of the set: When HDR mode is activated the whole screen is covered with something like a greyish/white fog, brightness is universally elevated and blacks turn to grey. In general contrast gets WORSE in HDR. I have a feeling that colors also get dull, but my main concern at this time is black levels. I've tried to fiddle with all (limited) settings of HDR mode, but nothing seems to fix that. Lowering brightness to 43-45(!) seems to mitigate the problem, but it's still there. I also lowered Backlight ("contrast" for this set), but it also does not completely fix the problem.
I've downloaded the Mehanik HDR10 test patterns in order to calibrate the set in HDR mode, but they don't seem to work for the particular set. Especially in black level calibration, whenever I try to change the brightness, it seems that the whole picture is universally changed, not step by step, and step 66 of the pattern is revealed at brightness 66-67(!), which is simply unwatchable. I can't explain it fully, but calibrating in SDR seems to change the display in "steps", whereas in HDR the whole picture is universally changed and cannot be calibrated.
The problem is not so evident in HDR movies through Plex, VLC etc., but it's definitely there in the native Netflix app. What puzzles me is the fact that it cannot be calibrated through the test patterns (played through VLC, Plex, native app of the set, MXplayer).
Every similar thread I came upon had to do with HDMI black levels etc., which is not the case here, since I only use the native Netflix app of the set. (On a side note, this set is the first I own with no settings for HDMI black levels, high-low etc).
Any thoughts? Could it be the Netflix app or am I missing something?