Hey dany_17_lord
What you could do without taking anything apart first would be to hold the “Home Button” + “Power Button” for ten seconds to reset the SMC inside the iPod. This resets the controller responsible for the iPod’s Logic Board behavior.
If this doesn’t work then you should try to blow compressed air on the Logic Board connections that connect the LCD display. This will eliminate any corrosion.
If the problem still persist then unfortunately you will need to replace the LCD panel
Good Luck