Question about Computers & Internet
I just got a refurbished CTL 171lx monitor for my HP pavillion pc w/ Vista. It worked fine for the first couple hours, but now the screen goes black for no appearent reason. I can get the picture back for 2 seconds at a time by turning the monitor off & on. Sometimes the screen will go black then come back on several times on it's own. Disconnecting the monitor for several hours & hooking it back up will work for a few hours & then the problem will start again. Thinking it was a driver issue I located & downloaded what was supposed to be the driver, but it was only the manual. I also went through the troubleshooting instructions with no luck. I'm lost! Is the monitor defective?
This looks to be a power supply fault - the inverters for the backlights are built into the power supply (Delta Electronics, model no. ADP-40AF).
Posted on Dec 11, 2007
Pls uninstall the video card drivers and reinstall them.
Also pls look for any graphics driver updates from the manufacturer.
Also pls check if the cable from the power supply for the graphics is connected on the motherboard.
Pls check with another monitor if it is doing the same thing.
If the same happens with another monitor, then it is an issue with the video card..
Posted on Jan 30, 2008
I had this similar problem. I found out that there was a bad 1000uf, 16V cap on the power supply board. The cap is too close to a heat sink and over heated. I bought the cap at radio shack for $2, installed it so that it is far away from the heat sink. Monitor now stays on when powered up.
These monitors are difficult to open.
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 buttons. Unplug the monitor cords from the driver board. 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. Unsolder the cap. It is located near a copper heat sink and the value will be on the cap. It will be buldged up on the top. You will see burn marks on the board surrounding the cap. Install the new cap and solder. Be careful not to solder across joints.
Reassemble and turn on. Should solve the problem
Posted on Dec 24, 2008
SOURCE: AOC LM725 LCD Monitor
try looking for bloated caps, check all diodes... see if its not shorted/leaking and finally check the power regulator ic if its not shorted! note: some capacitors and diodes are very tiny, you should use a lens with good amount of light...
if it does not help..... well, what the hell? try pouring some gas, then light it up! that should solve the problem, at least it turned on right? hehehehe!
Posted on Nov 12, 2009
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