Here's one solution: u may have a faulty on/off switch which u use to switch the p.c. on, open the case & trace the wiring from the on/off switch to the motherboard. to test do the following: unplug the cable from the motherboard & shut down the p.c. i hope this works for u
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If it EVER works, then the problem is not a failed part, but a weak part. The most likely component type to give you such problems are capacitors. But very few repair techs know how to find such problems, and even fewer have the equipment needed to find the bad one(s) in-circuit. The failure mode is high ESR (ESR means Equivalent Series Resistance). The lower the ESR, the better. Capacitors with high ESR cannot stabilize circuits which demand high pulse currents, such as in switch mode power supplies.
It doesnt sound like a windows problem. A simple test for this is to unplug the vga or hdmi cable from the monitor then turn it on if it has power it should say no signal. Also try either another power cable to the monitor or change the fuse. Hope this helps.
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.
The fault is a back-light problem and the fault could be a faulty inverter board or a faulty CCFL lamp. For service, parts and DIY info check out LCD Parts WEB site, please click on this link :- www.lcdparts.net
Ok, another words, monitor powers up for few seconds and shuts down by itself. If green LED on the front panel turns off as well or stays on? If stays on, then inverter turns into protection mode because of old backlight lamps. If it turns off in same time with an image on the screen, then there are some bad electrolytic capacitors in the power supply.
Try the monitor with another computer. If it works, the video circuitry (whether it is on-board or a separate adapter) in the Gateway is the problem and needs to be replaced. Otherwise, the problem is with the monitor itself. From your description it is probably the Gateway's video that is the problem since the power light on the monitor remains green indicating that it is seeng a signal, but not something it can properly interpret, i.e., one or more of the control signals are shot.
Can you explain what you mean by "stack"? Is this an external RAID array? Is this a software error message you are getting on screen?
If on the other hand you are referring to the box that everything else plugs in to that would be the computer, everything attached to it, including the monitor is a peripheral.
If it's the computer that has a blinking light on it and won't turn on or off, it must be on for there to be a blinking light... to turn a computer off manually you need to hold down the power button for over 4 seconds to forcibly turn it off.
Disconnect all external devices such as printers, scanners etc. etc. and try turning it on again, if you get the same problem disconnect absolutely everything including the power cable and hold down the power button for 30 seconds (time it as it will seem to take forever) and try again.
Message back if it's not the computer, just a peripheral your having problems with or if you still get the same problem.