Maybe you can show us some pictures ?
Astro's videos are of very low bitrate and poorly mastered , therefore the black levels are a mess.
The better TV you get , the more they will expose the flaws of lower quality videos.
Without actually seeing your TV , it is hard to tell if those effects are intended , or something is wrong with the display , or you are using the wrong input for TV.

Try changing to an alternate cable , change display mode to " movie " , turn on digital clean view. See if any of those helps . Also update to the latest firmware .
Play some high quality 4k footage , see if your screen is working properly .
Change Local Dimming to " low " when playing non-HDR video / content . Make sure the HDR+Mode is turned off.

There is some but it doesn't look too bad from your camera at least.

Does this happen to everything on the TV or only shows from Astro  ?
Try playing some 4k HDR demo from youtube and see if it persist.

The NU8000 is much brighter than the traditional TV out of the box , any grainy effects are made more obvious than on your older TV.

For lower quality channels like Astro , turn down the backlights to the level where it isn't so noticeable.

Just ordered a 55 RU7100 from Aeon.

This is to replace a 10 yr old 32 LG FHD...which still works fine.

Hoping to be somewhat impressed! will be linked up to my Minix U9-H.

Maybe not the latest and greatest but for 2700 and RM 200 voucher to put towards a decent sound bar, should keep me going for quite a few years.

Any tips on set up or just go with what the installer will do?

Thanks!

Thanks, just left it stock as delivered .no problems at all.

Was thinking about a sound bar but find the 20w on the TV are plenty good enough for movies etc.

Just one thing the Samsung remote is very clunky ,but using the Minix A2 instead which is great.

All in all very satisfied ,could have taken the RU65 for 3300 but really too big for my place,55 is perfect!

Hi guys, is RU7100 is a 4k TV?