buttons are not working perfect.therefore pressing automatically. you have to remove the panel after power on the monitor, (it may be dangers therefore get support by electronic technician , he will remove buttons and solder new ones or replace the switch panel.
In most cases this could happen because of electronic components getting aged. I suspect the monitor's LOT or some capacitors about to die. Get them replaced with the help of a expert technician. That should fix this problem.
There should be a menu button on the front of this screen, in this menu you will be able to adjust the settings for your monitor, brightness, contrast, size etc...
If you would like to adjust the resolution; right click on the desktop and select Properties.
Select the settings tab and slide the resolution bar to the right to increase the resolution or to the left to decrease the resolution.
ViewSonic E70fb 17" CRT Monitor, it is not LCD flat panel monitor, it does not have backlight assemblies. It uses picture tube (CRT).
Are you asking about ViewSonic E70fb 17" CRT Monitor problem or other model?
There are a few things that could be wrong; someone could have a remote and be messing you about, a button could be stuck on the monitor so its increasing, the computer could be slow or signals might be getting mixed up. try and figure it out based on what ive said. good-luck!
The setting is programmed into the memory of the monitor. It has been set that way, sort of like a memory button for your car's driver seat. The car remembers your favorite seat position, and the monitor is remembering your favorite brightness settings.
It's been a while since I played with any settings on a CRT monitor, but I'm sure if you give it a few minutes, you will find in the menu how to set up the memory recall feature on your monitor.
Please try to Turn the monitor off. Hold down the Menu button while the monitor is turned off, then press the Power button again to turn the monitor back on. This might unlock your OSD menu and remove that message from your screen. regards
OSD and Power Lock Settings • OSD Lock: Press and hold  and the up arrow for 10 seconds. If any buttons are pressed the message OSD Locked will display for 5 seconds. • OSD Unlock: Press and hold  and the up arrow again for 10 seconds. • Power Button Lock: Press and hold  and the down arrow for 10 seconds. If the power button is pressed the message Power Button Locked will display for 5 seconds. With or without this setting, after a power failure, your LCD display’s power will automatically turn ON when power is restored. • Power Button Unlock: Press and hold  and the down arrow again for 10 seconds.
Hello Edelberto, this monitor does not disarm by the back to disarm the monitor, you have to remove, with great care, the front frame and there you will see the obstacles you have to remove the panel assembly and the platelets
I hope you can disarm it, comment the results
Greetings Franco Dosil