There is a key on the keyboard which controls brightness. on mine it is the second key on the right, of the bottom row. it has a small sun on it. Press this key at the same time as the function key (on mine, bottom row, second from the left, blue key marked Fn) - and the monitor will brighten up.
This may or may not be applicable to the originally stated problem, but my monitor went dim after a momentary (< 2 seconds) power failure. I went into the monitor's menu, through the buttons on the front panel, and found that "Brightness" was set at 192 out of 100. Once I adjusted it, it would only range 0 - 100, as it should, but the brightest setting was still just as dim. Selecting the default settings didn't help either. Fumbling for other possibilities, I went in the menu into "Image Properties", from there into "Color", from there into "Custom", from there into "Red" (and later "Green" and "Blue"), and as soon as I started to adjust the Red balance, the monitor jumped up to full brightness. It seems that the monitor's built-in software becomes discombobulated. Afterward, the correct color balance settings were very different from before, so the basic problem seems to defy rational explanation, but maybe seemingly random fiddling will shock it back to normality.
Its could be either your inverter circuit board is about to go dead or your back lamps inside your LCD screen are going bad. Now back lamps are light bulb inside your LCD screen depending on how many hour you have on your monitor is less likely that your back lamps are going bad. Back lamp suppose to last I think about 10,000 hour or more.Try resetting your monitor.
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In this case I would like you to please try and connect any other monitor to the system and check if you have the same dull screen in the other one.
If it has the dull display too then I would recommend you to please update the video drivers for the system.
If the display is fie on the other one, then I believe the life of the CRT tube of the monitor has ended and there is a need to buy a new monitor
This is a bit tricky as you can get it fixed under warrenty but they will likely ask you to send back the entire computer not just the monitor. It is also something that you could fix or several shops could but the repair cost really isn't much less than a new monitor. You are not stuck using an HP monitor so anything will work and you can get quite a lot bigger or better for about $120 and up. Repair cost is going to be $80-$100 so as you can see for just a few dollars more you have a new warrentied monitor.
The screen uses very high voltage to light a very small but powerfull little flourescent tube
it is either the inverter that powers the tube or the tube itself
When my one failed i had a spare computer monitor at the time and managed to hook it up with no problem, backed up my files, and ordered a new inverter of ebay for about £30 unfortunatly it was not the inverter but the tube so i had to buy a new screen around £70 -£100 changing it was a bit fiddly but no big deal , hope that helps
Make sure all the cables are plug in tightly from the back of the monitor going to the PCU or your tower, try using or plugging power cable to different power source as well... Thanks for using fixya!!
Well, Declan try go to your display properties by right click on your desktop then left click properties. Go to settings tab and click the troubleshoot button.
Im afraid to say this however, its possible the your monitor has a problem because most laptops and as well LCD's and Flat Screen TV's have its disadvantage of its lifespan. Since these types of screens have limited feature especially on display that it doesn't distribute the light image very well inspite of its low radiation to give our visual taste more better and more clear. That's why that most of these types of monitors won't get your eyes strained. But when it comes to durability, it much lesser advantage to compare with CRT monitors.