w22 monitor connected to what ,my guess the vga cable
is the PC on,? what PC is it, with VGA port
is the PC making sounds, it must, the fans must work
2 to3 in desktoop
1 in the laptop (VGA on rear, most)
test the monitor on a good PC yet,be super easy, why not do that.
the manual is here, read that?
as you can see its 12 years old,, and may have ccfl tubes, bad.
http://h10032.www1.hp.com/ctg/Manual/c00771554
ccfl tubes when 5 to 10 years old fail
turn yellow
black
dim
or stobe
or are good one day not next or hour by hour or minute
a fact.
save all this pain, pick it up go to good PC and test it.
why wait, and even risk PC damage ,guessing as most do untrained.
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