My monitor was working fine until one day I turn it on and it comes on for 5 seconds, all the while making this crackling noise, then it loses ALOT of brightness, to the point that I can't see what's on the screen without shining a flashlight directly on it. Turning it off and on doesn't work, I've checked to make sure all the cables are plugged in, and adjusting the brightness and contrast doesn't help. The computer still works as it always had, it's the monitor that's giving trouble. Anybody else had it happen?
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Re: monitor lost contrast
The crackling noise will be the the inverter section cooking itself.
The power board is a BenQ manufactured part and this is common to a lot of LCD's.
Inside there are several small 8 pin IC's, one or 2 of these has possibly shorted out and died.
An easy repair, if you know what you are doing. If you are not familiar with the internals of an LCD though, I suggest you take it to a repair centre. The voltages inside can kill (even when it has been turned off)
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I have had the same issue with a Westinghouse 50 inch LED TV. I believe it is not the power supply but the HDMI input. You can temporarily work around by plugging your primary source into the other HDMI. You may also get some relief by using the Westy remote, finding the TV menu, then selecting (Option) (Restore All). There may be an arcane procedure to reset the HDMI.
Although I still have the problem to a slight extent (very slight wavering of the vertical lines going from dark to light or white) reducing the contrast from 100% to 80% seemed to do the trick. Although this monitor is on the way out, it has lasted about 7-8 years now, at least it will keep going for a while.
A 19" Philips LCD prefers a setting of 1440X900 if you are too far off this it will turn itself off.
Right click on the desktop, go to settings and set it to 1440X900 and then go to advanced and make sure the refresh rate is set to 60 Hertz. Shining a flashlight on the screen will help you see.
There other thing that might be causing this is the setting on the monitor itself. Press the Menu button on the LCD and adjust the brightness and contrast.
If all else fails, contact Philips. This is a premium brand and it comes witha 4 year warranty.
I can't take credit for this because on found on a review on Amazon.Com, but I tried it and it works!
"Another update, for everyone who is having the common crackling
problem, if you open the clock radio there is a black disk on the
bottom with a red and black wire coming out of it. This black disk is a
component called a piezo disk. They are commonly used to make noise for
buzzers in electronic devices, but appear to have no use whatsoever in
this clock radio. If you cut the wires going to this disk, the
crackling noise goes away. You can still use both buzzer and radio
alarms. There doesn't appear to be any functionality lost other than
the annoying crackling sound. Obviously cutting wires would probably
void your warranty, but do you really want to try your luck with
another RCA clock radio? Chances are the crackling will happen again
with the replacement or it will be DOA."
If you can handle a screwdriver and a pair of scissors, you can easily tackle this project, don't be worried about it being too complex. 5 screws, a snip, and you are all set. Make sure the radio is unplugged of course.
One of the buttons on the front of your monitor is probably stuck. (Only one of the buttons work at a time on most monitors)
I cannot recommend taking it apart your self (have a tech do it) But take off the front, check the buttons after you take off the front, and if it still occurs unplug the buttons from the monitor. If it stops (which it should) replace or fix the controls) If it doesn't, call an exorcist (just joking) or buy a new monitor.
make sure that the audio wire connected to the your monitor is fine or try 2 replace it and also makesure that the wire ome the main power which is connected 2 the switch or pc is fine and if necessary replace it i hope it works