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Monitor flickering, going black

Last response: in Graphics & Displays
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September 16, 2011 2:35:09 PM

So today I got an LG L196WTQ-WF from a family friend who didn't want her computer or monitor anymore, and I'm using it as a second monitor. But the problem is it's flickering a *** load and also turning black for a couple of seconds and then lighting back up and flickering again, when it goes black the power remains on. I've seen this monitor working like an hour ago on a different computer, so I know it's not the monitor that's broken, and seeing as I'm running two monitors on my graphics card (Radeon 5770) I'm assuming it's not the graphics card, but hey, maybe I'm wrong, I'm no expert.

Any help would be great.
a c 218 U Graphics card
a b C Monitor
September 16, 2011 3:53:37 PM

Have you tried using it by itself to verify it works properly? Also, verify that all of your video/monitor connections are firmly connected.
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September 16, 2011 3:55:12 PM

Connects are definitely connected securely, and no, it's not working by itself on my computer, but it was on a different computer.
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a c 218 U Graphics card
a b C Monitor
September 16, 2011 3:59:37 PM

What type of cable are you using (VGA, DVI, HDMI)? Are you using any adapters? Have you tried swapping cables with your known, good monitor?
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September 16, 2011 4:03:48 PM

No adapters, the non-working monitor is using VGA, working one is DVI, swapped them, same thing.
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a c 218 U Graphics card
a b C Monitor
September 16, 2011 4:07:10 PM

Sounds like your "new" monitor may be defective. Before declaring it deceased, I suggest you go into its menu and see if you can set it to its original default configuration. You could have a configuration issue in the monitor itself (not likely, but possible).

Do you have another PC/notebook to connect to for troubleshooting?
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September 16, 2011 4:09:11 PM

Yeah I can test it on another PC but it's midnight so I'll try that tomorrow if that configuration thing doesn't work. Thanks for all this help btw
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a c 218 U Graphics card
a b C Monitor
September 16, 2011 4:13:24 PM

Here to help, my friend. You are most welcome. Good luck!
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September 16, 2011 5:19:40 PM

When it goes black, take a flashlight and shine it on the screen-if you can still faintly see what should be on the screen-your desktop icons, wallpaper or whatever, then you have a bad backlight, inverter, or bad capacitors. If you can't repair it yourself, it probably isn't worth getting repaired.
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September 16, 2011 5:21:25 PM

Already done that, it's not the backlight.
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a c 218 U Graphics card
a b C Monitor
September 16, 2011 7:47:11 PM

Sounds kaput then. Sorry.
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September 16, 2011 10:10:08 PM

I've had two Samsung monitors that have done something similar-they would take forever to come on at boot, or out of standby. They would flicker and eventually come on, but once they were on, they stayed on. Eventually, though, they got to the point where they would not "wake up" anymore. Both had bad capacitors, and took probably 5 minutes to fix. And both are still working fine to this day. At this point, you have nothing to lose by opening it up and looking around.
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September 17, 2011 2:11:36 AM

If I open it up what should I be looking for/doing?
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September 17, 2011 2:35:50 AM

Ok so this morning I used my dad's laptop to see if it's the monitor or what, turns out it is not the monitor, it's working perfectly straight away on my dad's laptop, same cable as well, so it's not the cable, so is it something to do with my graphics card?
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September 17, 2011 2:47:31 AM

Just tried another monitor with the same VGA cable and it's not working, so I guess the problem is my graphics card... Drivers are up to date, so I'm assuming my graphics card VGA port is fucked or something... Any ideas on what I could do to try and fix it would be great... Sorry for triple post but I'm just trying to update.
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a c 218 U Graphics card
a b C Monitor
September 17, 2011 3:49:48 PM

Wait, I asked earlier about using the DVI cable on the "new" monitor and you said it still failed. Is that correct?
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September 18, 2011 2:49:41 AM

No that's not correct... What happened was I tried to swap them but the cable was oddly shaped and it didn't fit in the other monitor, but it was still a DVI.
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a c 218 U Graphics card
a b C Monitor
September 18, 2011 8:40:28 PM

So, the DVI port on your GPU works, but the VGA port may not be working. That is what you now know, I think. When you connect the new monitor to another system, it worked properly, correct?

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September 19, 2011 12:13:38 PM

I've given up on it, my dad gave me his old laptop so I'm just not gonna bother with dual monitor anymore... Thanks for all the help but it's just too much hassle.
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a c 218 U Graphics card
a b C Monitor
September 19, 2011 12:48:18 PM

Have fun with the laptop. Good luck!
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!