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when the computer enter the sleep mode, it is possible that the computer remove the check mark from this output activation.
When you have multiple ouptut like a internal LCD and output on a monitor, when going into sleep then waked up, laptop reactivate the internal LCD without reactivated the secondary monitor.
you could need to go in desktop property and reactivate the secondary monitor with the check mark listed : Activate.
If you only have one monitor but still a dual output card or two separate video card same thing can happend. try to connect the monitor on the second VGA or HDMI output and see if the video goes there.
then reactivate your secondary output and make it principal.
Does also happend when your computer is connected to a UPS power and your monitor is directly on the sector. (laptop issu also)
if a brief power outage arrive then the monitor shut down (no power) and the computer continu, as there is no monitor on the output any more Windows will automatically deactivate this monitor. when power goes back, this output is no longuer providing video. I suggest putting the monitor on a UPS as well.
When you say computer clock do you mean the LED read out on the mother board? if so the numbers you are seeing are error codes you will need the mother board manual to know what those codes mean. If you don't have the manual it's possible you can go to the mother board manufacturers web site and download one then you can look up the codes to see what the problems are. Hope this helps
when you disconnect the monitor from the PC do you see the self test appear on the screen? if you do then the monitor is working fine.
the issue is most likely that the computer's screen resolution is too high and your monitor cannot output that resolution , so it stays a blank screen or in 'sleep' mode as you described.
youd need to go into either Safe Mode when booting the system or find another monitor preferably a newer model to connect your computer to and decrease the resolution before connecting your monitor.
your LG monitor is bad then if you put another monitor on the computer and your getting video. Just as a last resort, you might want to put the LG monitor on another computer and if it stays in sleep mode then you know for sure at that point, the monitor is bad.
Ok. I think "sleep mode" means that your monitor might not have a tight connection. Tighten all connections. Also, push the power button on your tower. When you gegt back, go to screensaver- power settings- and from there you can adjust.
You must go into the BIOS of you computer and turn off the sleep mode and also in windows. Disconnect the monitor and power it on without hooking it up to the computer. If the monitor turn on and is working , then hook it up to the computer and try with with the sleep controls off to see if it works correctly.If this works you must check the owners manuals of the motherboard and monitor for the correct operation of the sleep mode functions.Then reinstall the sleep mode operation and see if everything works correctly. If the monitor fails to work. Try the monitor on another computer and see if it will function. If all this fails to get the monitor working , then you will need to have the monitor tested in a service center to find the problem and have it repaired. You should also check your computer on another monitor just to maker sure you don not have a problem with the computer too. Hope this helps you with your problem.
This problem could be caused by windows or the monitor .You need to hook up your monitor to another computer and see if you get the same response. If you do check and see in the owners manual if there is a control for power management.Find the control and try to adjust it, or turn it off. If all this does not work than you need to take the monitor in for servicing. If the monitor works,you may have a problem with the computer bios or windows itself. Check all power management controls in the bios and window settings and see if you can find the problem.Check the Microsoft website for this problem with your operating system and a solution. Hope this helps.
Disconnect the monitor from the tower and then turn on the monitor.
If u get a msg like no input signal or check video cable then the monitor is fine. If this is the case, it could be a problem with the tower or the cable.