"Dont even wait for idiot #2 to send a screenshot , just remote his pc and have a look"
The original fault description was "random red lines across the screen". Being more hardware oriented, that would indicate to me, with just that information, an LCD panel fault, GFX RAM or controller fault, main RAM fault (if shared RAM/onboard GFX). Remoting in or a screenshot might not show the fault, depending on the cause.
If the fault description had been "some words on the screen are underlined in red" then I'd probably have got it straight away.