Since the EU enforces the "right for repair" more and more, even Apple is starting to give in.
I don't know about the Steam Deck, but I saw the Asus ROG open and its architecture look quite modular. I assume that Valve also doesn't overcomplicate things.
Chinese products are usually not complicated to repair, so you should be good wih Aya and GPD.

But if you don't want to preorder anyhting, it's always good to check some hardware modder tech forums.

both
ya it is almost according to some reviews

Perhaps it's a little too early to say when it isn't even out yet. Plenty of things break after people actually start getting them in hand en masse and start doing tons of unexpected things.

Can you not return it under warranty, for a working replacement or even a refund ?.

Then contact support and initiate an RMA.

ya I will try that
re-imaging?

Return Merchandise Authorization, that's the process for making use of the warranty.

Featureset overall looks nice. Instantly reminded me of a PSP which is a pro imo. That said, seems support is pretty bad and it is very expensive and despite it's stats being almost 1.5-2x stronger than Steamdeck on paper it seems it only runs ~10-20% or so stronger in games. At least it fits in your pocket, which is never going to happen with the Steamdeck... though I think I'd scratch that thing up in no time if I did that.

Is there an instant rest mode of some sorts or do you have to rely on windows sleep mode for pause/continue a game? Read it was an issue for windows based handhelds but maybe there's a custom OS or something.

Re-image is to wipe the drive and install SteamOS in its original state.
https://help.steampowered.com/en/faqs/view/1B71-EDF2-EB6D-2BB3

RMA is Return Material Authorization (or Return Merchandise Authorization) You contact Valve support, go through troubleshooting steps with them, and if you can't fix it with their help, they will issue you an RMA, and either repair or replace it. Follow the RMA instructions on the Steam support site.
https://help.steampowered.com/en/faqs/view/04AE-8A9A-F64E-D165

Well, Aya is also working on their own Linux build, so in the future you can probably chose.

Any kind of suspension would have to be done by the OS not hardware. There's one problem though. Everyone is aware of sleep, but hardly anyone is aware of hibernation. Those terms are not interchangeable. Sleep keeps RAM alive and it still uses power. Hibernation dumps ram into storage and shuts down. This is pretty much what all those consoles, including the Steam Deck do. Go to Control Panel, Power Settings and enable Hibernation, then assign it to the power button. Microsoft keeps hibernation hidden for whatever dumb reason, which only helps Valve. Now hibernation on linux tends to be more stable, but it would be a lie to say that you cannot suspend games on Windows either. I did have a few games freeze after coming out of hibernation, but most do come out fine. I'd recommend pausing (Start/Esc) them, before hibernating though.

That's how I got over 100 hours in Hellblade on GOG, despite it only being an 8 hour game at most. I hibernated my handheld and resumed it several days later. Galaxy counted the entire time from launch to quitting lol.

It IS possible of course - at least in modern games. Consoles manage to do that just fine and they have no magic hard- or software that works very differently from ours.
Galaxy/Steam or whatever other launcher is used would get the info from the operating system and react accordingly. But someone has to implement these functions. And so far there just was no demand for it.

In theory, freezing games should not happen anymore, now that direct hardware access is prohibited. But there's always enough opportunities to mess something up.

Thanks guys, sorry for the late feedback, but I fixed it by giving up on all of my data, anyways got my steam deck fine