2. Maintenance
DO NOT use IPA or any acidic solution to clean the screen. The liquid will find its way into the edges of the screen and destroy the bonding, leading to broken lines. This is unfixable and will require a screen replacement.
These black screws for the hinges sometimes become quite loose.
The plastic of these screw holes tend to become very brittle and disintegrate. Try not to overly stress them when turning the screws. Never over tighten the screws.
My theory is that when one side of the screw posts fail, the other side that's still tightly glued on would tear apart the shell.
The chemicals in various types of glue might also have unknown adverse effects on this decades old plastic that's already trying to turn into chalk.
However, strengthening the screw post by applying epoxy on the outside of them might still be a good idea.
Apply a small amount of lubrication on these spots on the photo. This will help with fluid open/close action and may reduce the crackling noise.
HOWEVER, do not apply a big amount and allow the extra lubricant run off onto the screw posts. It's unknown if the lubricant would damage the strength of the already-weakened screw posts.
