Larry has a 7 year old laptop, and its LCD screen died. Leo says that often with laptops, the backlight goes out. If he uses it outside, he can adjust the angle to see something. If it's all black, then it's likely that the ribbon cable has finally broken from the frequent opening and closing. If he has a monitor with a VGA port and can plug it in, he can still use it as a desktop.
Another problem is the power supply. But after 7 years, they're really not worth repairing, especially since Larry can get a Chromebook for about $200, or maybe even an HP Stream.