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Software | Samsung TV: Disable Global Dimming to increase the overall brightness

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Contents of this article

Preparation
Instructions

Owners of Samsung Smart TVs, like myself with the nu7400 (nu7409 on the German market) from 2017-2019, have the problem that the TV reduces screen brightness during dark scenes to create an "HDR" effect or to reduce or prevent light bleeding in black areas. Unfortunately, you often can't see anything in the dark scenes, especially with SD content and daylight in the room. Settings like Eco Solution, Ambient Light Detection, etc. don't help. However, there is a "secret" service menu to disable global dimming.

I found this guide on Reddit and was able to successfully perform it with an Android phone and the 50" nu7400 to finally turn off the dimming of the backlight. The following steps need to be repeated after every software update.
[align=right][aname=heading-1][/aname][h2]Preparation[/h2][/align][hr]
[listsquare][li]If you only have a Smart Remote without number buttons, download "Remote for Samsung TV" (Android) or "SamsungRemote" (iOS) and connect it to the TV (the apps will guide you).
[li]Keep the regular Smart Remote handy as well.
[li]If a Samsung soundbar is connected that is controlled via the TV remote, temporarily set the sound output to the [highlight]TV speakers[/highlight].
[li]Any manual color settings (contrast, etc.) will be lost and reset to default.
[/listsquare]
[align=right][aname=heading-2][/aname][h2]Instructions[/h2][/align][hr]
[listnumber][li]If the TV is on, press the following buttons in sequence on the (App) remote:
[highlight]Mute - 1 - 1 - 9 - Enter (OK button)[/highlight]
This opens a menu with the option [highlight]Hospitality Mode OFF[/highlight].
[li] The menu is partially broken and strange to use. Press the [highlight]right arrow[/highlight] twice on the real Smart Remote so that [highlight]Hospitality Mode[/highlight] appears as the only available option, and set it to [highlight]On[/highlight]. Now press the [highlight]down arrow[/highlight] on the remote, which opens a completely different menu.
[inturl=./upload/files/1_samsung1.jpg][img]./upload/files/thumbs/1_samsung1.jpg.png[/img][/inturl]
[li] In this different menu, press the [highlight]Back[/highlight] button on the remote to return to the main menu.
[inturl=./upload/files/1_d694a270543011dee2162cfe1bf26b5b_samsung2.jpg][img]./upload/files/thumbs/1_d694a270543011dee2162cfe1bf26b5b_samsung2.jpg.png[/img][/inturl]
[li] Now, use the (App) remote to enter the following sequence of numbers:
[highlight]1 - 2 - 3 - 4 (- 5 only required for some models)[/highlight]
This opens yet another menu with an option [highlight]SVC[/highlight]. The App remote can now be put aside for the time being.
[inturl=./upload/files/1_ab8d2ecad0bf44ef5891f3d8d2783ffb_samsung2.5.jpg][img]./upload/files/thumbs/1_ab8d2ecad0bf44ef5891f3d8d2783ffb_samsung2.5.jpg.png[/img][/inturl]
[li] In this main menu, select [highlight]SVC[/highlight], then [highlight]Other settings[/highlight], and finally [highlight]CAL data restore[/highlight]. Navigate and confirm each option using the remote's [highlight]arrows[/highlight] and [highlight]Enter/OK[/highlight] button.
[inturl=./upload/files/1_samsung2.6.jpg][img]./upload/files/thumbs/1_samsung2.6.jpg.png[/img][/inturl]
[li] After selecting [highlight]CAL data restore[/highlight], you'll get an error, which you confirm with [highlight]OK[/highlight]. In the background, you might notice the program's color profile changing, but this doesn't matter.
[inturl=./upload/files/1_samsung3.jpg][img]./upload/files/thumbs/1_samsung3.jpg.png[/img][/inturl]
[li] Back in the service menu, press [highlight]Back[/highlight] again, and navigate to the option [highlight]Advanced[/highlight] without opening it.
[li] Now press and hold [highlight]Volume Up[/highlight] for about 5 seconds (this is why the soundbar control/output must be disabled), and this will change the main menu once again, revealing a [highlight]Picture_2D[/highlight] option.
[inturl=./upload/files/1_samsung4.jpg][img]./upload/files/thumbs/1_samsung4.jpg.png[/img][/inturl]
[li] Navigate to [highlight]Picture_2D[/highlight], then to [highlight]Subsetting[/highlight], where you'll find the entries [highlight]PWM_INI_2D[/highlight] and [highlight]PWM_MOVIE_INI[/highlight]. Set both of these to [highlight]100[/highlight] (0 = backlight off, 1 = backlight max). To do this, press [highlight]Enter/OK[/highlight] and use the [highlight]left/right arrows[/highlight] to adjust the value. Setting it to [highlight]100[/highlight] completely disables the annoying dimming. Once finished, press [highlight]Back[/highlight].
[inturl=./upload/files/1_samsung5.jpg][img]./upload/files/thumbs/1_samsung5.jpg.png[/img][/inturl]
[li] Once both values are set to [highlight]100[/highlight], you can simply turn off the TV.
[li] Turn the TV back on and repeat the first step. This time, set [highlight]Hospitality Mode[/highlight] back to [highlight]OFF[/highlight].
[li] Turn the TV off and back on again.
[li] Done.
[/listnumber]
By the way, have fun exploring the service menu  :wink:

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Beitrag (ID: 146) von freaked 1664 Klicks | Quelle
Geschrieben: 23.09.2024, 07:19:28 Uhr
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