[TechAssist] Re: Viewsonic VG150 LCD monitor, dark display
- From: "Art Bevilacqua" <abevilac@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 11 Apr 2004 22:20:47 -0400
Thanks to Pete's suggestion below (which was correct) the unit now =
lights up
as it should, you can see the menu when you enter it, and the box that =
says
"no signal" when the computer is off.=20
However, booting up the computer removes the "no signal" box, and as the
boot progresses you can see some faint activity as the background =
changes
brightness just a bit, but you can't actually see any of the computer's
output.
We've tried another monitor on the same cable, so we know everything is =
ok
up to the LCD monitor (unless the computer needs some odd drivers for =
this
display).
Does this sound familiar to any of you Viewsonic experts? Thanks, Art
Art Bevilacqua
Essex Radio and TV
40 Main Street
Essex, MA 01929
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of
majorthom@xxxxxxxxxxxxx
Sent: Sunday, April 04, 2004 12:55 AM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Viewsonic VG150 LCD monitor, dark display
Hi: this board is a DC to DC converter which drives a bipolar/dual drive =
FET
and HiV ass'y providing + and - HiV to the lamps.Look for a SMD fuse =
right
after the input plug from main board.THAT is the most common failure if =
you
have no output from the thing.I replace it with the filament from a 2Amp
fuse and that's that .I have no idea of what the value should be,but you
better be sure it will withstand extra current related to bad Fl. =
tubes.Let
me know..........................Pete
Art Bevilacqua <abevilac@xxxxxxxxxxxxx> wrote:This 15" LCD monitor has a
very dim/dark display. I believe the back =3D
light
is out, and peeked inside. There is a small "driver" board connected to =
=3D
what
appears to be the ends of a lamp across the top and bottom of the =3D
display,
or possibly a U shaped lamp around three sides of the display. There are
several voltages (looks like 7 and 12 volts) present in the wiring =3D
between
the main processing board and this driver, but there are no voltages =3D
from
the driver to the lamps.
Does anyone have any experience with these units?
Thanks
Art Bevilacqua
Essex Radio and TV
40 Main Street
Essex, MA 01929
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Peter Neal
Neal Electronics
1905 E. Wm.Cannon
Austin,TX 78756
=20
=20
=20
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