I think it’s advanced Optimus bug, try changing on bios to dedicate gpu if there’s any and check if the issue still there.

YES，already try changing only gpu model，but also exist.

Sorry to hear that, not sure then what the exact issue since I don’t have the model but you can try ask other users with similar model on Razer or gaming laptop subreddit, on the later one of reviewer said it’s gone with the time. Probably driver’s issue either from nvidia or the panel (through windows or bios update).

Some user said that the 18 4090 using the AUO panel would flash, but the 18 4090 using the BOE panel would not. However, the 18 4080 using the AUO panel will not flash.

It became a mystery