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.
Giotto di Bondone. While ultimately di Bondone chose to develop his own style of painting, as an apprentice he worked closely with his master, Cimabue. There is clear evidence that the two worked together on the ceiling of the Church of St. Francis in Assisi, portraying scenes from the saint's life.