Repairing RAM memory sticks for sale
I usually make extra money buying RAM memories that are supposedly broken or damaged. But it's certainly that many people don't know how simple it is to make a RAM memory come to life again.
Normally, dirt and dust that accumulates on the CPU usually hog the slots where the RAM memories are usually located. That's why sometimes they don't manage to turn on the computer and that unpleasant beep usually happens.

The most basic thing is to use a clean rubber to clean the cells that cause them to come into contact with the computer
Usually that's enough, but in special cases this isn't enough

For this, there is a special liquid that costs less than $5, which is an excellent pin cleaner