LG TV turn off basic screensaver (clock\fireworks)

Hello there!
Exuse me if post are miss-posted, but google can’t help me.

Grand problem - i need to turn off screensaver (LG TV 50UP7500LF, OS 3.51.16), don’t care about warranty. I need to switch off screensaver.

What already tried:
a. I have service remote - service menu don’t have “12. OLED” chapter, so i can’t switch off TPC\GSR

b. Regular menu can’t seitch off screensaver

c. ColorControl can’t helps me. I spent much time to find additional options to TPC\GSR but after it i have ColorControl app error. It’s not LG mistake, but i trying to find a way recognize my wishes.

Best regards! Tnx for any help!

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Exuse me! My bad…and tnz for suggest