Compaq 7540 brightness

ccfl screen
all this old are dead or bad. or turn yellow. all do.
all did.
all you can do is turn up the brightness or replace the tubes
CCFL are back lamp tubes. for the SCREEN
CQ58-nnn what, what it the full service tag Partnumber.
ill toss the 50 sided coin and land on cq58-100
the 100 model, is LED and not CCFL lamps
so what OS is running? Windows 7?
i yes, see the users guide on bightness.
read page 26
the magic F3 key.
if the key fails, that means, the drivers loaded on this pc are wrong.
http://h10032.www1.hp.com/ctg/Manual/c03308662

correct drivers are alway here at REAL HP (we are not hp)
im picking w7-64bit now, if not 64bit go back and change that first.

https://support.hp.com/us-en/drivers/selfservice/compaq-presario-cq58-100-notebook-pc-series/5259203

Hello, It is possible to adjust your brightness from your graphics settings. most likely there is a graphics icon located with the icon collection (show hidden icons) by your clock. Hope this helps Good Day

I have come across similar issues and got it resolved by The Best Pc Doctor Team.
You can also contact them on their toll free number.
www.thebestpcdoctor.com
877 407 9229(Toll free)

How low has the brightness gone? If it is very dark and you can barely see anything on the screen, it may be that the inverter board has failed and needs replacing.

The problem could also be caused by the screen itself, or the motherboard, but the inverter is the most common solution.

Actually, the problem isn't with the drivers. Right click on the battery icon in your system tray. Select "Power Options" (NOT Power4Gear eXtreme). On the right panel, select "Adjust the display brightness." Then, select "Change advanced power settings." Scroll down and open up the "Display" box. The options that are affecting your screen brightness on battery are "Allow SmartDimmer to reduce my brightness after," "Have SmartDimmer reduce my brightness by," and "SmartDimmer full-screen video mode." Playing with the percentages in these boxes will affect how your screen brightness adjusts itself. To get my screen to stop re-brightening itself, I changed "Allow SmartDimmer to reduce my brightness after/ On Battery:" to 100%. I then changed "Have SmartDimmer reduce my brightness by/ On battery:" to 0%. Finally, I set "SmartDimmer full-screen video mode/ On battery:" to Maximum Power Saving. This should solve your screen-rebrightening problems even with the 163.44 drivers (I use those too). Please Rate.
Thanks, Anand Fixya

change the monitor front panel menu control switches. (All 4 Switches)

<div style="FONT-SIZE: 14px; PADDING-TOP: 10px" itxtvisited="1"><span id="ctl00_ctl00_MainColumn_CenterColumn_ThreadBox1_lblProblem" itxtvisited="1">my hp 7540 crt monitor menu displays automatically blinks frequently. please hele me resolve this problem. it stays fixed on the screen, unable to do any work.</span> </div><!-- answer --><!-- from fixya rte -->

try reinstaling the driver for the monitor and or videocard driver good luck

1- Right click an empty space on your desktop.

2- Select Properties

3- Click Settings

4- Adjust the Screen resolution moving the bar to the right or to the left

5- Click Apply

6- Click OK

Please all I ask is call back and just gave a vote, it will gave me some satisfaction to know am helping some one, so I will keep on helping.

Thank you

TechSaver

Hi Kartik,

• You did not mention your Operating System (OS) in the question.
• But still you can do it by following the link.
• From the page choose your troubleshoot manual depending on your OS

-rate the post if it helped.