Question about Dell E173FP 17" LCD Flat Panel Monitor
While using the computer my monitor randomly goes black, need to turn it off and back on (sometimes more than once) to get picture to re-appear. Power light is still green when the screen goes black. Tried replacing video card and tried monitor on another computer, no sign of the problem on other computer and problem still persists with new video card. Any insight to this issue would be greatly appreciated! LG L1710S Silver Monitor keeps going black on an irregular basis. Light stays green. Need to switch the monitor off then on to regain picture.
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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 $2. This will work.
Why did the cap go bad? The cap is too close to a heat sink and over heated.
What does this cap do? This cap sends a signal to an IC which keeps the monitor 'on' after the power switch is pushed. When the cap is weak, AC ripple voltage is applied to the IC and it sends a signal to shut the monitor off.
Opening the Monitor: These monitors are difficult to open.
The two plastic pieces snap together and must be pried apart with a flat screw driver.
After removing the stand, you need to insert a flat screw driver at the bottom of the screen where two slots are located. Then work the screw driver around until the two plastic pieces are separated.
Remove the cover plate and unscrew the push button circuit board.
Unplug the monitor cords from the driver board and remove the screen.
Unscrew the mounting screws from the power supply board and remove.
You will need to pinch the plastic support in the middle of the board to remove.
Cap is located near a copper heat sink and the value will be on the side of the cap. It will be bulged up on the top. You will see burn marks on the board surrounding the cap. Unsolder the cap.
Install the new cap and solder. Make sure you connect + of the cap to + marked on the board.
Be careful not to solder across joints.
Keep leads long so you can bend the cap as far away from the heat sink as possible.
Reassemble monitor and turn on.
This should solve the problem.
Posted on Jan 01, 2009
I've had these problems also with a couple of dell monitors I've owned. Although it affects most CRT displays. To my understanding, this relates to the alignment of the 'electron gun' that projects the screen information. Sometimes, if you apply a short term vibration to it, the 'gun' will realign itself, if only for a short time until it becomes unaligned again. I have developed a simple method. I dub this technique: "The Fonzie Method." What you do is, smack the *$#! out of it a couple times from a downward direction and hope it comes back on. After that just give it to someone who can open it up and fix it. Never ever try that yourself because the capacitors within a CRT can store enough energy to shock you, potentially fatally. Always keep in mind, nothing lasts forever. Consider, it might be time to give it a decent burial.
Posted on Feb 24, 2008
Atwater Kent called it! I also found that one of the regulator chips was leaky (just a simple TO-220 cased 5 volt regulator that I keep tons of on the bench; radio shack has these, too!
It took longer to open the case and heat up the iron that it took to fix the darn thing.
Posted on Jan 18, 2009
My dell flat screen goes black one second after i turn it on. The green lights blinks as well
Posted on Nov 12, 2008
Get a mac?
Posted on Mar 05, 2008
Item: 17" LG L1710S LCD/TFT Monitor (note: SVGA output not DVI)
Check for compatability with Video card
Posted on Feb 02, 2008
I did everything I could to get rid of this problem such as removing the VGA card, network card, cleaning the dust and it didn't work. But one thing that I am not sure it will work for anyone is that I realized that I hadn't cleaned the RAM. I pulled it out and cleaned it, then re-inserted it and the computer went back to normal.
It is a RAM problem, I am 79% sure of that.
Posted on Jun 01, 2008
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Posted on Jan 02, 2017
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