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Hello, As mentioned that when you turn on the system the lights on the system turns on and the monitor goes off, unplug the VGA cable from the system tower and turn on the monitor and check if you get signals on the screen if it shows you some color bar or a massage, that means your monitor is good. IF not then there is problem with the monitor . get it repaired or replace it. If that is not the case you would need to unplug all the external devices connected to the tower and try, IF not then you need to open the tower and check for the green light on the motherboard if it comes on or you can try reseting the memory card or if you have an video card, then you will have to remove the card and try the build in one . Regards Samson ved
The monitor might be faulty ....do a monitor self test ...disconnect the datat cable from the monitor and turn it on ....there would be a color code , if the color code is ... RED....GREEN....BLUE which might appear as RGB or the colors itself......then the monitor is ...if the color code is different then the monitor has to be replaced
You can try the monitor on another computer to verify it is the monitor and not the display card at fault.
I'm assuming this is an LCD monitor. If you are sure the monitor is the problem, then your monitor's display driver circuit is probably getting close to failing. When one of the three colors (red, green, blue) becomes intermittent, the screen takes on the hue of the working colors. In your case it sounds like the blue is starting to fail.
A repair technician may be able to replace the circuit.
the light blinking makes me think that the moniter is going in to sleep mode...try turning the computer on while the moniter is not pluged in(pull the blue vga cable) wait a bit then move the mouse around then plug the vga coble back in...(while the screen is already on)
If you see the boot screen, then it is a problem with your operating system (windows)
If you do not see the boot screen, then it is the power supply or the motherboard isn't working.
If it turns green but you never see the screen come on, then it may be the video or the monitor.
If it does go directly to blinking amber, it is probabbly the power supply. It should only take a little while for a computer person to plug in another power supply and test it.
You can actually take a power supply out of someone elses computer and plug it in (don't even have to mount it in the computer)
Plug in the motherboard plug(s) and the hard drive only, then attempt to start.
If it does work, it is your power supply, if not then it is your motherboard.
are the dots appearing in diagonal lines or randoml across the screen? This would suggest to me either a loose connection in your cable or the screen is faulty and will need replacing. Sorry for the bad news
It could be your monitor is fine. It simply goes to a cycle when its turned on and does not detect any signal coming from your CPU, it simply goes on standby mode (hence the darker image and orange/blinking light.) have you checked the computer (CPU) part?