i used to work laptop repair and these things are universally just built so badly, they're so flimsy and incredibly hard to work on. you can't get to anything without miserable, teeth grinding tedium.
sure, the ram stick is exposed on the bottom, but to get to the wifi card you have to spudge the keyboard loose, and of course the ribbon on it is incredibly short and plugs into a backwards connector, and they stuck an adhesive foam lump to the lever that you have to rip off before you can release it
and then you want to get the hdd out so you try to separate the halves of the machine - which of course requires removing a dozen dissimilar and asymmetric screws - and then the halves just. won't come apart. there's 20 plastic tabs you have to pop around the perimeter, which keep reseating themselves so you have to pop them over and over and over, but even after all that you can feel something in the dead center holding the halves together, but you search and search for a screw and find nothing. what is it? a METAL tab you can only release by pushing the top chassis BACKWARDS
and even that doesn't help because now the machine just pops half an inch apart and you see a forest of ribbon cables joining the halves together, none of which you can reach without tools. it's just not fucking worth the effort.
and while you're working on it, you try to turn it on for a moment, but you find that the power button strip is made of such thin, flimsy plastic that it has no rigidity when not fully assembled. you have to pinch on both sides to get it to engage. and then it doesn't work, and you think you broke it, but it turns out that that ALSO connects with a tiny, stubby ribbon cable that you ripped out while separating the case halves
I wrote this in the second person because this is exactly the experience you will have if you try to work on a vaio. They're all like this - this one is a semi ultraportable but theyre all like this, nobody else built machines with as many pointless plastic parts that you have to risk breaking to disassemble. it's, somehow, just not a Sony