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Posted 28 February 2014 - 11:58 AM
Posted 28 February 2014 - 01:36 PM
Have you tried to boot into Safe Mode? If this is a driver issue you should be able to boot into Safe Mode where the manufacturer's graphics driver isn't used, a native Windows driver replaces it in Safe Mode.
What is the model of this Toshiba?
There may be a combination of keys like Fn + F5 to switch between the monitor and the laptop display. But we need to know the model in order to find this information.
Family and loved ones will always be a priority in my daily life. You never know when one will leave you.
Posted 01 March 2014 - 03:18 AM
Posted 01 March 2014 - 12:03 PM
What happens when you press the power button?
Does the power light come on?
Does the hdd light show any activity with the hdd?
Is the cooling fan running?
Posted 03 March 2014 - 06:31 PM
Posted 04 March 2014 - 03:56 PM
With what results?
Posted 04 March 2014 - 05:29 PM
Just a suggestion that would quickly rule out the driver thought:
You could use a linux live cd, fire up pc, boot from live disc.
No install from the disc required, you would only be using it as testing purposes,
If the display stays black then you can rule out driver issue i guess.
Posted 05 March 2014 - 01:30 AM
Posted 05 March 2014 - 10:31 AM
At this point I don't believe this is a software problem, I suspect that that either this a problem with the integrated graphics since the external monitor doesn't work. You also have indicated that you can't boot into the BIOS, this further indicates that this isn't a software problem.
When you try to switch between the laptop display and the external monitor you should be using the Fn + F5 combination, is this what you have tried?
Posted 06 March 2014 - 05:08 PM
Posted 06 March 2014 - 06:13 PM
How does it run just using the battery? Sometimes a power adapter will go out and not deliver enough power, or the round barrel connector end that goes to the pc is bad. The outer part is postiive, inner part is negative and the center pin wire is a sensor wire. If that is broken it can have adverse effects of the system running. The sensor wires tell the bios what voltage, watts etc the power adapter is. This has a lot to do with the power options in the bios as well. The port that it plugs into on the laptop can have a short for that sensor wire as well.
Edited by technonymous, 06 March 2014 - 06:14 PM.
Posted 06 March 2014 - 07:39 PM
Posted 07 March 2014 - 10:04 AM
Please post the voltage and amperage of the adapter you are using.
Posted 08 March 2014 - 01:57 PM
That is interesting you mention the battery/power supply as I was wondering about that myself as a possible cause. The reason I thought it was I examined the power/AC adapter I've been using is from an an old compaq/HP computer not one that came with the computer. also the computer does seem quiet/sluggish as though it's possibly not getting enough charge. AC Adapter says to us with HP/Compaq products only. The power cable came with a Compaq Presario 2100 laptop. Don't really know how I came to start using the Compaq one -- never noticed. The Toshiba Satellite L555D-S7930 that I'm having the black screen issue with is also larger and is a 64 Bit. I don't know much about what kinds of power sources/chargers are needed -- I figured as long as it fit/worked in one laptop it would also work in another. Suggestions would be much appreciated. I think you may be on to something...
Desktops the power cord is usually all the same. On a laptop it is a little more critical. You could be harming the laptop giving it to much power. Not enough power and you get issues too. As an example...
I came across a Dell laptop that had sluggish slow issues. It turns out that the power cord box has been knocked around one to many times. Inside the box a copper coil soldered to the board had popped loose and was dangling around in there crisscrossing other wires. It was only delivering partial power and the bios would sense this and the power options would down power the cpu to 800mhz instead of full 1600mhz while plugged in. Pulling the power the bios was set to run 800mhz instead of full 1600mhz to conserve battery life. The cord was also not charging the battery properly. Furthermore, the cord on the end has a sensor wire inside the barrel if this is broken or power port on the laptop is shorting out it will cause similar issues as a failing power supply box. Again, to low of voltage or to high of voltage causes problems. In other words you should always use the adapter that goes with the laptop. They all have different specs.
In response to your post #3 yes monitors can get shorted out as the wire straps run through the hinge of the laptop screen. It's possible this finally wore it out. Or the power inverter or tube in the screen itself is also worn/blown. On a serious note: Do not attempt to repair this yourself the inverter has small high voltage capacitors that will happily kill you if you was to get electrocuted by it. A tech should be consulted with to do the hardware repairs.
Edited by technonymous, 08 March 2014 - 02:00 PM.
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