ylod is yellow light of death - usually different lights flashing. Its the same old problem of the solder under the graphics chip losing connection - I think there are kits to better mount and heatsink the graphics chip (after the usual fix of overheating it one way or another). Not my field but .....
Google is your friend
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates