Monitor of LG My PC remains very dark for about 10-15 minutes after switch-on,then gradually clears.I lodged complain through the toll free number given in the cahmemo. One service-provider attended me but couldnot solve the problem. My phone no.-9434239882.Will you send an expert?
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Re: monitor is dark
I assume that 'clears' means brightens?
The cathode heater is often supplied with a filtered DC voltage of 6-12 volts.
Often, there is a capacitor on a board plugged directly on the base of the CRT and if this fails, its capacitance becomes unstable and insufficient to adequately filter the voltage and supply clean DC.
In some monitors, the capacitor may be on the main board instead of the base of the CRT.
A technician should locate (not difficult) the CRT heater pins if not marked, and determine where the filter capacitor is located, measure it for capacitance and replace it if needed.
The value is normally many times what is required to clean up the DC but this type of part can (and will) break down chemically and its value will shrink to a very small value while its losses climb.
Eventually, this results in the effect you describe.
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The 204B monitor have a known issue with power supplies that start failing and you get the "slow to show picture" problem just like you have. The monitor is very easy to repair and the parts are low cost. Here is a link to our repair guide http://www.ccl-la.com/blog/index.php/samsung-204b-lcd-monitor-repair/ If you can solder then you can fix your monitor. If you don't want to repair it contact me and we may be able to buy it from you for parts.
You need to check your power options settings and modify it , so that your monitor does not turn off automatically.
If you are using windows xp , go in control panel and then there would be an icon for power options , double click the power options and then you would find settings which read turn off monitor , turn off hard disk etc... select the turn off monitor to never mode or as per your convenience and you would have your problem solved.
Ok. this is a solution i gave another person that had a similar problem. hope it works for you.
1. Your images come on the screen after a few minutes yes? that means the cable from the monitor is working. no problem there.
So, when you screen "comes up" does it come up suddenly or does it gradually fade in from completely dark to bright? If it fades in, then the problem may be your monitor. if it comes up suddenly, the problem may either you monitor or you graphics card.
Try hooking up another monitor to the computer. If no problem occurs then the problem was definitely your monitor. If the same problem occurs, then the problem may lie in your graphics card.
If the problem is in your monitor, then you can simply replace it. If the problem is in your G-card, then you can replace that as well (assuming you graphics card is not build in). If it is built in, then you still get a new one (assuming you got an expansion port for it *most computers usually do*).
You can try this. Open the cover (Unplug the monitor and leave at least for 30 minutes before doing this). See whether dust is there. If there is dust, get a 1" paint brush and gently remove the dust with the brush. Always sweep the dust away from the unit. If black dust is present around certain cables and around the flyback transformer (that black box covered with aluminium plates), use a soft cloth to wipe them (do not wet the cloth).
*Make sure you dont turn those rings on the back of the tube while wiping the the dust.
After cleaning the dust, replace the cover, connect it to the PC and check. You will have a brighter picture!
The monitor was broken. I returned it to the vendor for replacement. Your tech did not seem to feel it was a monitor problem and only focused on the video card - although I asked him directly regarding his confidence of it being a videio card problem versus being a monitor problem.
Plz check your monitor's vga cable for ok .I think there is problem in 1,2,3 no pins wires continuity.If it is ok then check components thats are connecting these pin to video amp. ic on crt neck.If they are ok then change video amp. ic with new one.Hope this solution works otherwise i am always ready for help