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Open Power Options in Control Panel, depending on your OS, set to High Performance, Change Plan settings, adjust or Change Advanced Power settings. If your on battery power your Laptop will dim the display to conserve battery power.
I have the same model but 4g. I often notice the same problem, but once i step out of the full sun/bright lights, i notice that it is infact dimly lit. This can be adjusted by opening settings > display > brightness > turn off automatic brightness and set the level to at least %50.
now, if your screen is literally too dim to see, try this : Press the power button quickly, now unlock the screen by sliding your finger from the bottom center up to the top center and releasing, all in one fluid motion. This is the default screen-lock gesture and the brightness, if this is indeed the issue, should go up one notch upon unlock. From there, follow the above procedure to turn up the brightness.
do you have the unit plugged in when this happens? there are different power settings when the unit is plugged in and when it is is just using the battery. You can adjust those settings in the user tools or or preferences. It will also do this when you are idle, the unit is just trying to save battery life.
Examine the keyboard. There should be a symbol on most of the function keys (F1, F2, etc.). Look for one that looks like a sun or lightbulb, either with an arrow pointing up or with the sun/lighbulb filled in. Hold the 'Fn' key, and tap the up/bright sun/lightbulb key a few times. The screen should increase in brightness.
If you cannot find the specified keys, you may be able to adjust brightness from inside Windows. Right click on the battery icon in the taskbar and open 'power options'. Look for a sun and moon with a sliding bar between them. You might also be able to adjust brightness by customizing your desktop (right click on the desktop and look for the proper menu).
it could be a dim adjustment. did you hook up the dimmer wire to the factory harness if so and your dash lights are low then thats the issue. if not then check the brightness on the unit. if that is not lowered then the internal lights inside the unit have started to burnout. if thats the case uninstall it and send it in for repairs
I spoke to Garmin Support about this issue. There are 2 settings for contrast on the nuvi 1300. You need to set the contrast while it is plugged into the vehicle, and also while it is unplugged from the vehicle. The reason for the 2 settings is to save the charge of the battery while it is not plugged into the vehicle or power source.
Ok on your keyboard there should be some way to adjust the brightness just plug in the laptop and adjust it to what you want then unplug the laptop and adjust it to what you want and it should keep that setting. if that does not work you can check the bios settings some laptop bios' have a brightness option.
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.