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Let it power on. If it plays the normal windows music then look very carefully at the screen. You may need a flash light. If you see a faint image then your inverter board or back light have burnt out. It will a small board 1 x 2 inches usually and have a small wire coming from the power supply and one going to the bottom or top of the screen.
The flashing light indicates there is no video signal reaching the screen. Check the cable between the screen and computer. You can even turn it around and use the other end in the screen. It should be the same at both ends. If still nothing turn the pc off and on again.
this means your power inverter inside the monitor is dead. This little gizmo lights up the monitor backlight. They dont fail all at once, but slowly die and give problems like you describe, you can order these online for your monitor , or find one on ebay for under 30 dollars, but unfortunately there is no fix, other than replacing the inverter.
sorry. Please use the thumbs up rating if you find my answer helpful, albeit bad news.
kdavey53, "switch-mode-power-supply" for X193W is probably in shutdown mode due to having detected a FAULT CONDITION with itself or another circuit. Black screen = partial shutdown?? Black and Blank screen = full shutdown??? Which is it? Are you going to repair unit or use warranty? Have you seen video clips at youtube for "LCD monitor disassembly" and "LCD monitor repair" dealing with the most common black screen problem with ALL BRANDS of lcd displays? FYI visit www.ccl-la.com/badcaps.htm or www.badcaps.net or try wikipedia and search "capacitor plague" !!! Read more of my responses to other BLACK/BLANK screen owners for more options that you may have open to you. If not inclined to DIY repair, then have deep pocket$$! Your best shot and what I would do is buy new AND repair X193W to keep as working spare unit. Might only cost $10 in parts on a DIY. But you will need to do the research and understand the problem that you monitor is having. Do you understand what makes your screen "light-up"? Have you any of the new style "curlie-Q screw-in energy saving CFL light bulbs? Same basic principle! Just implemented in different way to produce RAW WHITE LIGHTon reverse side of what you been looking at. Look see only FYI www.ccfldirect.com and then you will know. I'm lmistyrel on aim or 12fixlouie on fixya Hope this was of some use.
The screen brightness may be too low. That may happen in certain power regimes ( when used on battery power, presentation, etc.) Here is how to change screen brightness on a Toshiba satellite that has the Toshiba Power saver software installed
Go to the Control panel, Click Toshiba Power Saver ( icon has two hands praying?) and increase the screen brightness. in each of the different regimes provided : Full power, High Power, Normal, DVD Playback and so on.
Try removing the motherboard from the screens and attach the battery the green light should turn on and stay on.
Now attach the lower screen and turn on. If the screen is ok the screen and green light will flash and then turn off. (if the screen doesn't flash the bottom screen is you're problem and will have to be replaced)
If this happens the problem is then you're top screen which you will have to replace.
What I have done in the past is to change to project to high power mode for some time and then change it back to low power mode after 20-30 mins. This fixes the flashing light issue, at least temporarily.