Laptop monitor blacks out, but when you hit the toggle....
My laptop monitor blacks out (you can faintly see the desktop), but when you hit the toggle that makes it think you shut the lid and opened it, it turns back on. Sometimes it stays on for only a second, sometimes for hours. I notice that the more you open the lid, the longer it stays on. Very wierd!!! I recently bought a new power supply. Also, the battery is dead. I can only run the computer plugged in. It's a great computer otherwise and I hate to waste it for something that seems repairable. Any suggestions? It is a Toshiba 1805-s204 Thanks!!!
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Re: Laptop monitor blacks out, but when you hit the...
Sounds like you need a new Switch. Oxidation has probably built up in the switch. It can be fixed. Probably shop around for a certified tech who can replace it. The switch is cheap, Labor is starting around $65 - $90.
You said you can faintly see the desktop. This is the invertor board inside the LCD assembly that causes this. Again if it needs to be replaced, the invertor is fairly inexpensive,
labor isn't. The technician that ckecks out the laptop can determine what it needs. Yea, your right, it is a good laptop and it is worth fixing.
Just a heads up, if the tech says you need a new motherboard, he's lying, find another tech.
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Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.
Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.
If you see no icons by shinning a flash light and the external monitor works,then your screen is bad. If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.
If you shine a flashlight on your black screen and look real hard for the icons on the desktop. If you can faintly see them that means your LCD Inverter is bad. You'll have to disassemble the LCD Screen to get to it. In the mean time you can attach another monitor (LCD Flat Screen or the Old style fat CRT) with a VGA cable to the vga port on you laptop. Once you have it connected hit the FN (Function Key) + (F1 thru F12) key that that corresponds to the external display. Hold the FN Key while you hit the Function Key that is for the external display. The key might have the words LCD/CRT on it or it might show a display symbol. That's the key you want to hit while holding down the FN key. This will cause the desktop to display on the external monitor and verify that there is no problem with your Video Card inside the laptop.
On laptops both the laptop LCD screen and the external video port can be toggled to show laptop LCD, external vodeo and bothe laptop LCD and external video. You need to press and hold down the Fn key and one of the function keys that has the monitor symbol, repeated pressing this function key will toggle the video outputs. I cannot advise you which function key works with your laptop as they vary between different laptop manufacturers.
for your video problem, you may be stuck in a different mode try holding the Fn key and hit F8 this toggles through the modes 1 - LCD on laptop only 2 - LCD and external Monitor 3 - External monitor Only
if this does not work you may have a LCD issue with the laptop .. let me know how it goes first
You don't say if this is a laptop or a desktop. I am going to assume it is a laptop and tell you that one of the Function Keys (F7 or so) will turn off your laptop's monitor, such that you can use an external monitor, for giving demonstrations,using Visio or another type of application that requires a larger screen than your laptop's screen.
So, it is a triple toggle type switch, such that hitting it once, turns off the internal screen. Hitting it twice turns it off while the external screen is working, and hitting it a third time, allows the internal screen to work while the external screen works, too. That way, you can see your external application working, while you're able to focus on the application on your laptop itself.
See if this is the case, that you have it toggled to turn off the laptop internal screen.
Try plugging the laptop into an external monitor to make sure the laptop is booting up properly. If it is unplug the monitor from the laptop; or if you know the laptop boots up fine and you get the windows audio when it boots and the initial starting beeps then forget the monitor. Shine a torch or light source on the screen and if you see a faint picture then the inverter on the screen has developed a fault.
Fn + F5 toggles the display output, the trick here to wait each time you hit this combination because it goes through several options. Hit it once and it may want to go to just the external, then both the laptop screen and the external. etc. Now Fn + F6 turns the backlight bulb off on the internal monitor to save energy. Now I am giving up the link to your service manual, it is in PDF format so you can make a copy for yourself and keep on the laptop, print it or save it to a flash so you can reference it later. I believe if you take the keyboard off and disconnect the video lead on the left side where the display plugs into the motherboard, then when you power the laptop back up it will default to the external cord and you can use the laptop without any switching. That is what I am doing with an Aspire 5920 that I am rebuilding. Good luck, ParrotHead PC Repair Just copy and paste the link below to you internet address bar and hit enter.