I have an Acer laptop that is a few years old and just recently it has started having an issue with the screen. What happens is that I will turn the computer on and the screen will turn on fine, but then it will make a noise almost like white noise and then the screen will go black. (At first the screen would just become very dark, but the problem has come to a point where the screen will be totally black.) I can hear the actual computer turn on even with the screen black. Recently, I found that by hitting the Fn button or a combination of it and the F6 button the screen will actually turn back on for a few seconds during start up. Once the computer has turned on completely, either of these sequences will cause the computer's screen to turn on for an indefinite period. What is the cause of this issue? It only seems like one that will get worse.
Laptop Model: Acer Extensa 4420
Processor: AMD Athlon 64 X2 Dual-Core Processor TK-57 1.90 GHz
Memory: 1790 MB
System Type: 32-bit Operating System
Windows Vista Home Premium