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There are three choices here...bad screen, bad connection, or bad video card, if the card is integrated onto the motherboard, then that part of the motherboard could be bad. If you have access to another monitor or a TV with a vga input, try the computer with another monitor. If you get a signal on that other monitor then you know you either had a bad connection with the other monitor or you lost the screen on the old one. Go back and reseat your video connections with the computer off. Don't ever remove or move cables to the monitor and video with the computer running...the screen can suffer permanent damage. If there is no signal on any monitor, then either you have a bad vga cord or your video graphics card had died.
You got a short circuit in one transistor located at the inverter area. The transistor is acting like a conductor and not shutting down the power to the back light inverter. If you are a technician and want to fix it, look for short circuits in transistors.
I'm thinking your video card is sending a signal the monitor doesn't recognize. You'll need to start the computer and hit F8 until you get the black and white menu. Choose the VGA mode and it should work well enough for you to adjust the refresh rate or the resolution to get the monitor to work
IF THE WHITE SCREEN STAYS ON: White screen indicates the signal from the video board inside your monitor is not getting to the screen. You will have to take it apart to try to maybe fix it. First thing you want to check is the connections from the video (VGA DVI) board to the back of the lcd panel. Bad connection here can cause your problem. If the connections look clean and tight then you may have blown a fuse on the back of the lcd panel on the long circuit board. Usually the fuse is near the right side of where the ribbon connects and can be marked F1 or FB1. Checking this for DC voltage of about 5 volts may give you an answer. firstname.lastname@example.org
ok here could be 2 problem
1 your computer done send video signal
2 cable it is bad
you should try first to other computer to see if work , if yes that means your computer it is with problem , if not work that mean your monitors dont receive signals
Your backlight is starting to go bad! These backlights are little tiny florecent bulbs, these can be replaced and they do burn out. Sounds like your back light is bad! Could be costly to replace as there are not too many places out there that will replace the bulbs.
Assuming you've already checked your driver and system settings, tried a different monitor, and checked the cable and connector pins, this would almost certainly be a problem with the power or signal circuit board inside the monitor.
The problem is in the "soft switch" technology:
On some of Sylvania's newer monitors they have incorporated what is called "soft switch" technology. This allows your ATX power supplied computer to turn your monitor on and off using it?s software controls. Therefore, your monitor?s light will always stay on blinking even when your computer is off.
The monitor in normal operation consumes about 80W of power; in the "OFF" state it will be reduced below 8W. The "OFF" mode of the monitor can be controlled by the PC input signal or by pushing the soft-power button to disable the PC signal control for manually turning off the monitor screen.
Thus, when the monitor is in soft-power "OFF" mode it still consumes a very small amount of power. For the purpose of making it noticeable to the user that the monitor is in soft-power "OFF" mode, we designed the power indicator to provide for a slow blinking signal (every 2 seconds). If you need to totally turn off the power, then the power cord would have to be unplugged. The same is true of the PC itself, but the PC does not provide for notification while in "OFF" mode.
Your monitor looks like it may be in need of repair, contact info:
PTI Technologies Inc.
7372 Doig Dr.
Garden Grove, Ca 92841
Hours: Mon - Fri 8:00am to 6:00pm PST