If you have someone with the etched screen around, go have a look at it before you embark on this adventure, I was very disappointed in the matte-ness of the screen.
What is a bit easier and relatively easy is to upgrade the ssd https://www.ifixit.com/Guide/Steam+Deck+SSD+Replacement/148989
Have fun with your deck!
Adding to that, capacitors can take a very long time to discharge. They can still do serious damage after not being connected for months