The upper screen is blotchy and we are unable to view it. I have bought a replacement lcd screen but would like step by step instructions on how to replace it please.
If you have not opened a DSLite before - particularly if it is the top screen - save yourself the grief and give it to a professional.
Changing the screen will cost about £25 if you provide the screen
Damage could be more expensive, including damaging the flexi on the screen if done incorrectly.
It has been done wrong MANY times.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix games consoles.