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Yoy see the yellow power light because it is not seeing the video signal from your PC's video card, so that can be the possible cause since you reboot the computer and you get the signal back. Your computer may need to be looked at, try reseating the video card if it is not integrated into the mother board, reset the RAM, check to see if it has any caps with bulging tops in the mother board.
• 1) TAKE OUT YOUR LAPTOP BATTERY • 2) REMOVE YOUR AC ADAPTOR CORD, that's the wall power, remove it. • 3) NOW HOLD DOWN THE POWER BUTTON FOR 30 SECONDS.
That will drain any static electricity that has built up on your laptop
system board and many times fixes the problem of a black screen. After
the 30 seconds re-connect your laptop to the wall power and hit the
power button normally and see if the laptop comes back up.
this is not a problem with the monitor, it looks as your computer is not sending any video signals to the monitor thus it goes into saving mode. Take a look at the computer, check the video card. Pull it out then turn it on, turn it off again and place the video card where it should go then turn the PC on again. This should clue the OS to re-configure the video driver. Did you try another monitor ?
If *nothing* displays on your screen, the most likely problem is your LCD Backlight Power inverter. If the backlight power inverter is bad, you can usually see some remnants of an image on the screen if you shine a light on it. If the backlight power inverter is bad, it may not be worth repairing on a 17" screen, considering the low cost for a new one.
It should be noted that Envision provides a 3-yr warranty for most LCDs, so contacting them for repair may be a good option. More information here: