Take it from me. I had the exact issue. I got my deck, and it immediately had that problem. It’s a problem with power delivery to the GPU I believe. It can even be checked if you look at the kernel logs you’ll see GPU error.
Sorry to hear it’s still an issue with decks. RMA that poor thing.
I’ve been waiting for these bad boys to be back in stock so I could get the 64gb model super cheap. I don’t need a steam deck, I have a good rig, but I really wanted one for on the go. Thanks for giving the heads up.
Sea of Stars went on sale and it’s fantastic.