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Re: monitor displays no signal as soon as i boot into win...
You may have to put the laptop in presenter mode, which tells it to use the attached monitor. There is supposed to be a key on the laptop which does this, its normally the FN key with CRT/LCD (F8). You can also do it via screen properties but since your screen is broke u'll have to use the key shortcut.
If that doesn't work, then your video card may be bad and you'll have to change it.
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How do you know that the laptop is booting into windows did you connect to an external monitor
and if it did work on external monitor you could then uninstall the display driver in device manager or do a system restore and then when windows restarts it may load the correct driver ( if that is/was the problem )
If you are sure that it is booting into windows but cannot see anything you could try restarting pressing F8 while booting to get you into safe mode and see if that will show on monitor if it does you could uninstall the display driver reboot and hopefully windows will reload the correct driver
This might be a sign of a faulty LCD cable or screen inverter board. The
LCD cable transfers data signal from the motherboard & video card
to the LCD screen. It also supplies high voltage DC power to the screen
inverter board. The screen inverter board works as a power supply for
the backlight lamp mounted inside the LCD screen. It converts low
voltage DC power to high voltage AC power needed for the backlight lamp.
Test with an external monitor attached to the laptop. If you get display on the external monitor, then this confirms the case.
check it with external monitor if you get display then lcd is gone bad otherwise if you get dell logo then restart the system , press Fn key and power on the button it will start psa test
check for any hardware failures.
if hardware is working fine hen you will have to reset the system back to factory settings or reinstall fresh operating system.
With the external monitor connected, try holding down the FN key and pressing one of the F keys at the top of the keyboard that has a Monitor icon on it. This should turn off the external screen and show the laptop screen. If you press it a 2nd time, BOTH screens should show up. If still blank, Press again until the External Monitor comes back on. Then go to www.dell.com/support and go to Drivers for your Model. Then download and re install the VIDEO or DISPLAY Drivers. This should fix it if its a missing driver. If STILL no display on the laptop, call Dell.
When you start your computer, keep hitting the F8 key. you will get a menu that comes up.. Choose the VGA mode.. this will stop the computer from loading video drivers and will allow you to install the new monitor.
Give that a try.. Hope it helps... let me know
Try connecting it to an external monitor.
When you do, as soon as you press the power button to turn on the laptop, close the laptop lid - as this forces the laptop to display on an external monitor.
If this works, then it means the laptop screen is bad.
If it doesn't, the most likely cause would be that the laptop video card went bad.
For a while, some older Dell laptops with high-end nVidia graphics cards tended to die suddenly.
Try connecting an external monitor to the Dell Inspiron 9300 and see if the vertical line is also present on the monitor. If the monitor display is fine, then your laptop’s LCD display panel is defective. If the monitor also displays the vertical line, then your problem is with either the video card or motherboard located inside your laptop. Not sure if the Compaq Presario has an external monitor plug, but if it does the above procedure can be applied to that one as well. Your responses are intended to improve the level of service provided. Please rate your experience. Thank You.
Well it is most likely a issue with the Video driver as you are able to boot to the safe mode.I would suggest going back to the safe mode and deleting the present driver for the video from the device manager.before you restart the system just download the latest version from the support.dell.com so that you can reinstall it.Also check in the graphic properties which screen is set to be the defuat.Incase still not working i would suggest reinstalling the operating system before replacing any hardware.