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.
Fra Angelico was born in 1400 in Florence, Italy. Between 1420 and 1422 he entered a monastery the San Domenico at Fiesole. He painted altarpieces and manuscripts. Linaiuoli Altarpiece, a triptych enclosed in a marble shrine, was an early masterpiece, but he went on to paint famous frescoes at the monastery of San Marco in Florence and a chapel in the Vatican. He died in 1455.