Question about LG Computers & Internet
Turning the monitor on, after a few seconds the backlight(at least that's what I think it is) starts blinking for a few seconds and then stops, after a while comes back again. I've tried changing supply cable, changed the wall socket, only thing I need to further test is with a a different DVI cable or try using HDMI but I don't think it's from the cables, cause the monitor is doing some strange low "zzz" noise in the back, right side, which is what I think, from watching some videos, the lamps position. I wanted to know some different opinions before I start disassemble the monitor. In my naive opinion I think it's a "unpplugged" cable somewhere near the lamps, or, I hope not, it's the supply board that is "wrecked". NOTES: -The monitor is ~ 2 years old; - The "blinking" is not "black and white", it's like if you are pressing softly in a switch plug and the light kinda "blinks" fast; - Monitor never turns off by itself; - Randomly the "zzz" noise stops, and comes back again; - The noise doesn't coincide with the "blinking"; but oddly enough when it stops the monitor seems fine. - The noise looks like a "warning message" that the monitor is going to start the blinking fest. Would like to know your opinions. Thanks
The powering off and on the back light is due to bad capacitors. Go ahead and explore the internal power supply. This is a very common issue on LCD I have fixed about 8 of these ranging from 1 yr of use to 9 yrs of use. I own 4 LCDs and have fixed 3 of them. 2-X2Gen, 1 Samsung and one Viewsonic. The latter one is running with out an issue and the one I use the most.
Once you open your lcd look for plunged capacitors. Replace as necessary. The fix should cost you less than 20 bucks
Check this pics for power supply removal, bad caps and new caps.
Well, pictures are over 4mb let me know if you are interested in seeing more pictures relating to this fix.
Posted on Mar 25, 2014
Testimonial: "Ok, this definately is an iternal problem. The monitor now goes black despite being turned on and after turning it back on again, it stays on for 2 seconds and goes black again. So yes, this should be what you're describing. Would appreciate those pictures if possible, cause i have no idea what i am about to do. Another question is, where can i get those capacitors and what kind of material would i need to replace\fix it. Thanks"
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Posted on Jan 02, 2017
are you getting a check signal cable message? any on screen instructions?
try the cable, if it works on another monitor, then sorry to say but your monitor is fried
Posted on Sep 01, 2009
This is a common problem on LCD monitors after a few years of use. Because of heat buildup in the monitor case parts called capacitors have started to blow out. When they blow they cause the power supply to fail and not provide the correct voltages the unit needs. If you go to our site at :
www.ccl-la.com we have pictures of what the blown capacitors look like. Open the back of your monitor and look for the blown ones. If you can solder then you can do the repair yourself. Unsolder the bad ones and install new ones. You will need Qty 2 1000uf 16volt and qty 3 1000uf 25 volt capacitors.We have a parts kit for $12.00 I will post a step by step repair guide for you on 11/29/09. If you don't want to do the repair yourself we do offer a repair service for $35 plus return shipping. If you have any questions please contact me at below address.
I hope this helps, if so please rate our solution.
Posted on Nov 29, 2009
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