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Re: dim compaq s510 crt colored monitor
If you are comfortable working with tools, down to component level and know how to work around EHV areas, then it is possible to increase the brightness of any monitor including the Compaq S510.
Make sure that the unit is unplug, Open the back cover and locate the FBT. You have to run/power on/attach a running PC to the unit with the cover off. Extreme care must be exercised. If you are not sure, you're better off asking a qualified service professional to do the adjustment.
There two plastic slotted adjustables, focus & screen. Adjusting the screen changes the screen voltage going to the CRT. This will make the display go very dark or overly too bright. Adjust to your preference (not necessarily technically correct) The focus may also be adjusted this way. You have to run the unit with the back cover open for a couple of minutes to stabilize the voltages and the heater/CRT/ Adjust after a couple of minutes if necessary.
In other monitors, there is a trimpot (small variable resistor) the adjusts the sub-bright.
Further improvement maybe achieved by adding a 100uF/250V capacitor across the supply of the 70+VDC of the 3 gun transistors. If you are sure how to go about this, it is best to consult or seek the services of a qualified TV technician who can either show where and how or do the job himself.
Hope this be of some help to you. Pls post again how things turn up. Good luck and kind regards.
The above solution worked perfectly for the Gateway EV910. Originally I had maxed brightness on front control knob and played with gamma/etc in vid card settings. Nothing worked as well as above mentioned. Thank you very much!
I got this monitor from the trash and now I know why : )
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Press the button labeled "Auto" on the front of your Compaq monitor. This runs an automatic configuration utility designed to examine your current settings and adjust them to reach the best possible picture quality. This utility will take only a few seconds and will adjust things like the sharpness, brightness and resolution of the image being displayed.Press the "Menu" button on the front of your Compaq monitor to adjust your monitor's screen settings manually in the event that the auto configuration utility has not done so to your liking. Navigate to the "Picture" category of your Compaq monitor's on-screen menu to adjust settings like "Brightness" and "Sharpness." These settings can be useful if your monitor is displaying an image that is fuzzy or too dim. Use the "Color" setting to adjust the amount of red, green and blue that your monitor displays. These settings can be useful if your monitor is displaying too much of one color or not enough of another. Use the "Default" menu option to reset your Compaq monitor to its original factory settings. This changes any settings you have altered back to the way they were set when the monitor left the Compaq factory hope this helps
It is very dangerous to work on tv's or monitors without the proper training. They hold voltage even after they are turned off and unplugged, enough to seriously injure someone. There are however adjustments that can be made once you crack open the casing, but if it has already lost color, it will only continue to lose it if you can ever get it set back right again. You best option would be to acquire another monitor. If you want to try it anyway, there are screws in the back of the metal chassis that adjust color, hue, brightness, and shape, that can be adjusted with a small screwdriver.
If this is a CRT-based TV and it's been played most of the time, you may have a bad picture tube, especially if strong red colors bleed to the right. CRT's dim with use, unlike LCD or plasma. But it could also be trouble in the video circuits - none of this falls into the DIY category, unfortunately. High voltage involved, unless you're comfortable around it and want to try turning up the screen controls inside the TV. If you do, let me know - but "no response at all" from the external adjustments points to a more serious problem.
It's probably not a matter for adjustment, it's probably in need of electrical troubleshooting to find and replace defective components.
It may be the CRT itself. One way they often fail is to show or lose one particular color more than another.
These days a common 15" CRT monitor is probably not economical to repair by a brick-and-mortar service shop.