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You need to just find the 2 keys on the keyboard that control the monitor outputs. 1st is the FUNCTION key located down in the bottom left near the CTRL and ALT buttons. Secondly find the function key going along the top of the keyboard (F1 to F12) that looks sort of a monitor, and a line on each side of it. Next depress and hold the function key (bottom), then press the monitor key (above). You do have to wait 1 or 2 seconds for the laptop to change modes as it will not be immediate. The 3 modes are Laptop only, Laptop & External, or External only,if you miss the mode needed then keep performing this until the correct mode is showing on the two monitors.
you should probably get a new screen fixed to laptop, because until u log in and system boots up properly, second screen will not work,
as u tried turning of laptop forcefully, advance boot options must be up on computer, hence not displaying.
First after you boot it up normally (not Safe Mode) can you move the mouse far to the left or to the right do you see the mouse. If you do see the mouse pointer you are running dual monitor mode and the laptop screen is set as the primary monitor. You have to run it in Save Mode and set the external monitor as the primary monitor. Hit the Start button then select Help+Support and in the search box enter "dual monitors". Read how to set up the primary monitor.
Second maybe you need to activate the external monitor. When laptops boot normally (not Safe Mode again) with a external monitor connected you have to hit the Fn (function) key (probably blue near Alt key) and some other number key (it probably has a blue monitor symbol on it) I'm not sure which one. This key sequence is a toggle sequence. In other words when you boot a laptop it goes directly to the laptop screen then the first time you do a Fn + number key combination it will turn on the external monitor and turn off the laptop screen the next time you push Fn+number key it will turn on both monitors (external and laptop screen) the third time it will turn on only the laptop screen and so forth.
Are you sure it's going into power save? When you boot it up does
everything seem to work except the screen is black? If so, that's not
Shine a flashlight on the dark screen to see if you barely
see 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 be
any kind of monitor even the old big fat crt monitors as long as it has a vga
cable to connect to your computer's vga port. If so that proves your
video card is ok. The video will show on most systems when you reboot
without 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 correct
key for displaying on the monitor (F1 thru F12). The correct key will
normally 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 light
and nothing shows on the external monitor, then most likely your video card is
Assuming that it is an "external" monitor, and not the built-in LCD screen in your notebook, you have to tell your computer which option you want:
* output only to internal screen
* output only to external monitor
* output to both internal & external.
Look for a BLUE-coloured 'FN' key on your keyboard, and a button that cycles through the above 3 settings. Push that button while HOLDING the 'FN' key down.
If your computer is set to "internal-only", then the external monitor will _stay_ in "power-save" mode, although the monitor will work fine if connected to some other "desktop" computer.
remove the battery and remove the power adaptor ... press and hold the power button in the ON position and count to 20.
attach the AC adaptor only and press the power button ...this should fix the issue ... then re connect the battery.
if this does not work then add a external monitor .. if it lights up then hit the
Fn + F5 keys
Fn + This hot key cycles through the power-on
display mode options.
The display mode options are:
Built-in display panel only, Built-in display panel and
external monitor simultaneously, External monitor only.
Fn + This hot key cycles through the power-on display options.
The display modes are:
❖ Built-in display panel only
❖ Built-in display panel and external
❖ External monitor only
❖ Built-in display panel and external
video device simultaneously
❖ External video device only
go to control Panel, Hardware and Sound and then select Power Options. There are several plans to choose from or you can create your own Power Plan. Choose when you want the display to shut off but make sure the "Put the computer to sleep:" is set to "never". The save the changes.
Cause If you connected the monitor power already is on, you may not get signal. Power plug off the monitor first, Then connected to laptop. Then power the laptop and power the monitor. FN key press hold with your Monitor swicthing key which symbol of two monitor shows on key probably number 5 or 6 maybe 7 check user guide if you have it.
another cause is your monitor may need driver install in your laptop, Some system required that. Check monitor system requirements.