My monitor is turn off when i change rezolution is work only at 800*600 at 1024*768 don't work is turning off idk what to do please contact me

check the main earth wire near the battery. and one near the rear of the lights. unbolt them and clean the connectors up put some grease on them after. then check again. remember that when the earth wires come off the radio code will be needed to reset the the radio. be safe and take the battery off.

hi you must disable the main screen in properties section of the display panel then when you start up the computer the screen will not activate until windows has loaded and found and installed the screen drivers after that all should be good to go if you need any further help don't hesitate to contact me :)

Here are some troubleshooting steps for the lens error problem. And here's a video summary of those steps:

check caps

First remove the vga cable from the desktop and see the monitor shows no conection if showing there is no problem with ur monitor if not change the monitor if showing conect the cable back to ur desk to vga port then check the ram remove the ram clean the surface with clean cloth then rub the print using an eraser then insert the ram and switch on if still no display change the ram if still not working remove the processor heat sink na clean th surface of the processor and the heat sink apply a thin layer of heatsink solvent or thermal paste fix the heat sink then restart the computer

Hi there.
OSD Lockout or On Screen Display Lockout message is that irritating on-screen message that sometimes pops up when you switch on your monitor. This completely locks all monitor settings.
This problem has most likely happened to everybody at some stage or another. Everything has worked fine until now you turn on your monitor and have a message glaring you in the face displaying something about "OSD Lockout". This doesn't allow you to change any of your monitors settings, including the setting intended to turn off this message. While this problem mainly happens on HP monitors from my looking around I know that others have encountered it on other brands as well. The fixes I provide below should work on those monitors too so don't fear if your monitor isn't an HP model.
The HP Fixes
FIX 1
Plug in the monitor and power it up. Hold down the monitor's Power button until you get a message saying "OSD Unlocked". If the problem persists after OSD is unlocked then unplug the monitor from the wall, wait a few seconds (just to be sure I'd give it anything around 20-30 seconds) and then try again.
FIX 2
Instead of holding down the Power button, turn on the monitor and hold down the Menu button for 10-20 seconds. This should unlock the OSD.
FIX 3
Turn off the monitor, press down the Menu button and then turn on the monitor. Wait 10-20 seconds. This should unlock the OSD.
FIX 4
The Menu button may be stuck in a pressed in position. To get it "unstuck" you'll usually need to open up the monitor. If your not a seasoned veteran at opening up electronics (and knowing where all the screws go back into) then this could be tricky unless you know what you're doing. Unfortunately there are too many models of monitors for me to give a step by step instruction guide for you. If you have warranty this is where you should use it, I suggest you contact the manufacturer.
The AOC Fixes
FIX 1
Turn off the monitor, hold menu and power button together for 10 seconds then turn back on.
Currently these are the most commeon fixes.
~ Slasher_X

That usually means your convergence is off. No matter what you do, you cannot repair unless you replace the IC chips.

If your computer does absolutely nothing when you power it up - the fans don't turn on, no lights turn on and the the monitor screen stays dark, some component inside your personal computer has failed. Unfortunately, there are no visible fuses that you can replace. There's a good chance the power supply has failed however you need a PC power supply tester to test it. However, there are other components in your computer which could have failed and cause the computer to do nothing when you power it up. If you have the required tools, test equipment and understand how these components work you can test them and determined which component has failed. Otherwise, you need to have a computer technician determine what your problem is.
I'm sorry that I can't help you more, but repairing computers is similar to repairing automobiles . If my car will "turn over" when I turn the key on but will not start, I could replace the fuel filter, fuel pump, coil, ignition computer etc. until I found the problem, but I don't have the parts/tools, I don't know how to test automotive problems and I don't want to waste money and possibly cause more damage by just guessing. I take the car to my mechanic for repair.
If you have any additional questions contact me by clicking on the "Add a comment" link located under your problem description on FixYa. Also, if you believe that this information was helpful to you, please rate my solution using FixYa's "Solution Helpful" rating scale.
Best regards,
Yavacotech

Hold the push to talk(PTT) button while turning the unit on, it will talk to you. press PTT to change channel, push monitor to switch to codes, press PTT to change codes. When you have the correct settings press monitor and it will confirm settings.

you can make your monitor didn't go sleep from screen saver window select advanced and change option to never

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best regards