My acer X193w screen went blue and wont show red

you disconnect the monitor from PC
& see: it will show no signal or check signal cable. that means the monitor is OK problem is in PC. may be you PC is not booting properly. if monitor does not come on there may be fault in the main board of your monitor.

VGA is an analog connection, so you should connect it to your monitor BEFORE starting up the PC. Otherwise it won't show anything

orange light mean your monitor not have input signal, check your computer vga card

may be possible that a cord from monitor to cpu is loose.
if not it is a problem in the driver ic and the cost of repair is about 20-25$

If you know the cable and the place it was before
replace it and reboot the dude (Ps if you dont have the referce and instructions for the take a polaroid

check in your computer graphic drivers are installed correctly.
If installed then when you power up the computer press F8 key then enter in enable vga mode.Set screen resolution to 1024*768 then apply and ok.
You can set screen resolution in control panel dispaly property.

Any of the 3 internal wires that delivers the tree color (Reg-Grenn-Blue) is disconected or damaged.

Open your monitor and try to locate that wires...

Good Luck

Best Regards !

First, make sure that it has found you exact monitor, if not install the drivers for the monitor and see if that helps. Also check the specs on the monitor and make sure it can go to the size you are selecting

sounds like a video card issue.  Check the screen on another computer.  If it is doing the same thing, it is the monitor.  If it doesn't, then you have a video card issue

Burn in unfortunatly is permanant. It damages the liquid crystals that produce the image.