We have a Samsung blu-ray player BD-J5500E about 4 years old, which developed exactly the same problem (constantly switching on and off) on about 25/6/20. Tried everything to fix it, no joy. On the US forum it seemed like hundereds of people had the same problem with a variety of models at about the same time. We contacted Samsung Switzerland on 1/7/20, they replied within 24 hours had their repair contractor send us prepaid postage label, we sent the player in (without accessories) and within 3 days got the player back fixed. All completely free, not even postage, very satisfied.
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