Acer AL2416W 24 in. LCD Television "2nd monitor comes goes black" Questions

...2nd poff, monitor returns to normal brightness 3rd poff, monitor turn to black when turning off and on again the acer logo flash up for a sec. after that the monitor stays black. i changed the ...

...monitor recently i left the room for a few minutes and returned only to find that my plasma had no picture. the sound was there and all of the menu features seemed to respond to command attempts but ...