This usually indicates a failure of the backlight inverter. If you shine a very bright flashlight on the screen and can see a recognizable pattern like the OS desktop, that is almost certainly the case. If you are handy and it is an ordinary laptop, you can usually get the part on eBay and swap it out yourself.
Fra Angelico was an early Italian Renaissance artist and a monk, considered to be one of the most talented fresco painters of his time. He was born Guido di Pietro in approximately 1395 at Rupecanina in Mugello, but nothing is known of his parents.
Masaccio, Holy Trinity, 1424, fresco. In the church of Santa Maria Novella in Florence is one of the best examples of the early Renaissance scientific approach to creating the convincing illusion of space within a painting. It is here, on one of the walls inside the church, that Masaccio painted his fresco of the Holy Trinity in 1424.