Hardware issues with Nintendo DS Lite consoles

Recently I've bought 2 used Nintendo DS Lite consoles. With both of them had hardware issues. All pictures were taken with a Samsung Galaxy S10:

1st one

It had a pixel stuck in red color, in the top screen. Each pixel consists of 3 leds: right, blue and green. So in this case it was one red led which got stuck on all the time. I've tried massaging the screen with the stylus but no luck. You can only see it with a black screen turned on or when certain colors are displayed on the screen, certainly not with a white screen.

 

 

Stuck pixel in red captured with normal zoom

 

Red stuck pixel captured with maximum zoom

 

Some areas look like burn pixels in black color, although I didn't notice any dead pixel

2nd one

This second console has much more serious upper screen ghosting:

 

 

 

 It has also a couple of things:

• the game Super Mario 64 DS freezes after 30 to 50 minutes of gameplay, and sometimes the cartridge is not detected when powering on the console, so has to be removed and put back again even more than once in a row.  It's a console defect since with the other doesn't happen.
  
• the D-pad is a little bit worn out and sunken, and you have to press quite a bit to score the diagonals, otherwise Mario stop moving briefly.
• the bottom (touch) screen looks like it has been mounted a little displaced towards the right side, it's not centered to the looking glass.
  

 

 

Bottom screen is off-center (overview)

 

Bottom screen is off-center (detail)

 

Nintendo DS Lite: has 4 brightness levels, which you can switch between by touching the sun at the bottom left corner in main setup screen after powering on the console.