Toshiba Equium A100-02k laptop black screen

Remove the main battery and power adapter, let it sit for about 5 minutes and try booting with no battery.

Let me know what happens, I can help!

Hi. try accessing the Start-up BIOS features by pressing F2 or Delete key when you see the Toshiba logo. Check for the Tab that will give you the control for the brightness/contrast of the screen. If that doesn't do anything then most probably the backlight (LED or CFL) must have been busted. and needs replacement.

^_^

replace motherboard

if the fan is not running continuously then its the fan ans board problem.because the board is getting hot and fan is not running so the board is getting overheated and the machine is nor working.and if the power light is ON and fan is running but only the screen is black/blank then its the problem of inverterboard.the cost of new board is $25 get it replaced fromn near by laptop repair center. thanks.

You can try connecting an external monitor and if you can get to the CMOS/BIOS you can verify that the active screen is your laptop screen. If everything is OK on the BIOS, then probably your laptop screen is broken. To enter the Bios use F2 or F10 (depending on model) when booting.

The screen brightness is automatically adjusted by your laptop's Power Management configuration in the Control Panel. Depending on your laptop's brand you might not only have the Windows power management, but also a proprietary power management application within the control panel or in your Start Menu programs usually listed under your computer's brand name. For example a program folder called "Toshiba" under Programs for a Toshiba laptop. Anyway, I would start there. Usually you can set up the screen brightness according to whether or your computer is plugged in or working on battery. Good luck! :)

You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:

• Screen flashs on red/pink and off.
• Picture stays on in red and slowly be come normal.
• Picture flickering with dim display.
• Picture flickering on and off.

All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

Startup while tapping the F8 key,this should open the startup options screen,Select start up in VGA mode,If that works,then you need to update the video drivers

try function key for lcd it may be in presetaiton mode by mistake
or is lcd on / come on bright then go dim / dark just very dim if so your backlight is out replace lcd