Laptop starts up and runs but screen is black. Seem like trouble with the little button that turns off monitor when you close laptop. If I push and release this button while the laptop is on the screen flashes and for a split second you see the desktop screen. Is it possible to get to that button and see if it just needs cleaned or replaced?
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Have you tried going to the BIOS? If you can see the BIOS screen there's video and the hard drive could be the issue. If you can't see anything but black screen you probably need to replace screen and or video invertor board.
I'm a pro laptop repair/rebuild tech. If you own an external regular computer monitor or even a friend who does, connect the laptop to the external monitor and power it on. Your Toshiba will have an F key with a little icon figure of a monitor on it. Hold down the fn key and press that F key to transfer the laptop display signal to the external monitor.
If the external monitor shows your normal laptop screen as it would usually display, you have a bad laptop LCD and some other (as yet) undetermined problem. If the external monitor is black just like the laptop, then yout video/graphics card has failed and since it's closely associated with power up issues at the beginning of the startup cycle, is interfering with the laptop's ability to run the operating system because it never gets that far.
From what you've described, you're going to have a choice of sending the laptop to a motherboard repair service (if you go to eBay and type "Motherboard Repair Laptop" in the search window you'll see many choices) for a price between $100 and $200 or need to start shopping for new laptop.
I see many monitor with that trouble.
When you turn on comp., you can have a picture on monitor about 10-30 min. and that go in black screen, or If you change resolution again go in black screen.
You must repair monitor or bay another.
when switching on te laptop, does it make noises, does the fan run, the CD/DVD-drive LED shows green light and the harddisk rattle little bit? - good for you if it does, as the system still boots up !
to check if the LCD screen is broke and not the graphics card malfunctioning:
hook it up to an external monitor (one usually used with desktop PCs) when laptop is switched off, using the 3-pin input in the back or to the right side of your laptop, and make sure the external monitor's power cord is properly fused...
Now switch on the external monitor first and then your machine again, and wait for the laptop boot messages on the monitor! see anything? if yes the laptop screen is broke and needs to be replaced. If still the external monitor stays black the onboard graphics card is up in smoke and you're in big trouble then.
Well.. you'd still have to open the lid to turn it on, right? (because you didn't mention the model of your laptop, I don't know where the power button actually *is*)
You want to close it while it's on, without it hibernating or going to sleep...
Go to your control panel, then into power or power management (depending on your Windows version, because you didn't mention it)
Then have a look under the "advanced" tab where it asks "when I close the lid of my computer". Set that to "do nothing".
Now when you close the lid, the laptop screen should turn off, but the PC should keep running. I'm not sure if that will still turn your external monitor off though.
I think that is your best solution, other than hacking off the little button that senses when the lid is closed. =-]
How are you trying to use the monitor? Just connecting it to the laptop? I know on most laptops you have to select to use the external monitor it won't just come up. You usually have to hold down the 'Fn' button and then press 'F5' or 'F7' to toggle between - monitor only, monitor and lcd, and lcd only.
If you are trying that, what happens? Does anything show on the screen?
It could be your LCD backlight giving you problems. With the computer on and the monitor power LED green shine a flashlight in the lower left hand corner of your screen. Look for the ?Start? button, if your backlight is not working you?ll see a faint ?start? button if you look closely. Depending on the monitor this is usually and economically repairable problem. Let us know if you have any other questions and please don?t forget to rate this posting.