I have a 1905fp that seems to go out of sync horizontally after 15 min. The monitor is about 3-5 years old and displays beatifully for the first 15 min or so. Then it will distort the colors badly and there will be two images overlayed and offest by about 50%. For example, If I move the mouse cursor there will be two of them tracking around on the screen one in the normal position and one about 50% of the screen width to the right. I have tried it on muliple computers so I don't think its a video card issue. Also it seems to get better with rest. If I turn off the monitor for 5 min, I may get 2 min of good picture before it distorts. Finally, I replaced the filter capacitors that typically go bad on these units and it didn't seem to have an affect. Any tips or suggestions would be greatly appreciated.
They dont last forever... time for replacement as most are not user-serviceable..
SOURCE: Screen goes blank
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Cause of power going
off: There is a bad 1000uF, 16V cap
on the power supply board.
Solution: Replace cap. Radio Shack sells a 1000uF, 35V
cap for $2. This will work.
Why did the cap go
bad? The cap is too close to a heat
sink and over heated.
What does this cap
do? This cap sends a signal to an IC
which keeps the monitor 'on' after the power switch is pushed. When the cap is weak, AC ripple voltage is
applied to the IC and it sends a signal to shut the monitor off.
Opening the Monitor:
These monitors are difficult to open.
The two plastic pieces snap together and must be pried apart
with a flat screw driver.
After removing the stand, you need to insert a flat screw
driver at the bottom of the screen where two slots are located. Then work the screw
driver around until the two plastic pieces are separated.
Remove the cover plate and unscrew the push button circuit
board.
Unplug the monitor cords from the driver board and remove
the screen.
Unscrew the mounting screws from the power supply board and
remove.
You will need to pinch the plastic support in the middle of
the board to remove.
Cap Replacement:
Cap is located near a copper heat sink and the value will be
on the side of the cap. It will be bulged up on the top. You will see burn
marks on the board surrounding the cap. Unsolder the cap.
Install the new cap and solder. Make sure you connect + of
the cap to + marked on the board.
Be careful not to solder across joints.
Keep leads long so you can bend the cap as far away from the
heat sink as possible.
Reassemble monitor and turn on.
This should solve the problem.
SOURCE: LCD Dell Monitor displaying purple and green rather then picture.
sounds like your monitor is starting to go out. if there are any speakers near your monitor, it is likely magnetic interference. try moving your monitor to a different area and see if it still does this. if it does, i would replace the monitor. if it doesn't, just simply reorganize the area around your monitor and it should go away after degaussing the screen.
SOURCE: Display jumping vertically
I had same problem.
Narrowed it down to C637 on logic board.
Replace C637 or logic board.
Testimonial: "I don't know what a c637 is or how to replace it or the logic board and I can't find anyplace on the net that has instructions or even information"
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