Get it.
There's light for the adapter, so it means there are enough power
to the power adapter. However, this doesn't translate to enough
power for your monitor. Buy new stuff for your computer lately?
Like new graphics card? Or added more RAM? How many watts for your
PSU?
Since you stated the age of your LCD, it could be due to the age of
your LCD. Most LCDs don't last for more than 3 years, so it could
be dying on you.
Try your LCD on other computers first. If it gives the same
results, it's most likely the monitor. If there's no problem, it
could be due to your computer specs or graphics card is on the way
to the dustbin (means going to spoil).
