Blank Screen but secondary monitor display works.

Hey Roger,
Below is information that should help you with trying to get monitor and notebook screen to work.
First make sure your laptop is equipped to be able to connect a secondary display, there should be a port for connecting a standard monitor cable on the back.
Connect your secondary monitor and reboot the laptop, the system bios should recognize that a second monitor has been added.
Then right click on your desktop and bring up the display properties dialog box.
Select "settings"
Your laptop should be identified as monitor 1 and you should also be able to see the secondary monitor as monitor 2.
Click on the secondary monitor and check the box that says "Extend my Windows desktop onto this monitor".
Set your screen resolution and color quality for the second monitor and click apply.
Directing icons and browser windows over to the other monitor is just a matter of drag and drop.

Thank You,
Dell-Jesse L
Dell Social Media and Communities

My sylvania cl772B turns on and shuts right off. what can I do?

this is from the manual for your computer. you need to get it on both monitors simultaneously.


When you start the computer with an external device (such as an external monitor or projector)
attached and turned on, the image may appear on either the computer display or the external
device.
Press <Fn><F8> to switch the video image between the display only, the external device only,
or the display and the external device simultaneously.

There isn't much you can do with the loose issue...it's plastic and wears

Below is information that should help you with trying to get monitor and notebook screen to work.
First make sure your laptop is equipped to be able to connect a secondary display, there should be a port for connecting a standard monitor cable on the back.
Connect your secondary monitor and reboot the laptop, the system bios should recognize that a second monitor has been added.
Then right click on your desktop and bring up the display properties dialog box.
Select "settings"
Your laptop should be identified as monitor 1 and you should also be able to see the secondary monitor as monitor 2.
Click on the secondary monitor and check the box that says "Extend my Windows desktop onto this monitor".
Set your screen resolution and color quality for the second monitor and click apply.
Directing icons and browser windows over to the other monitor is just a matter of drag and drop.

Thank You,

Dell

There is a button that you have to push when you use an external monitor - see if you can find reference to it in the manual or go to the web site for further assistance.

You may even be able to google for the info.

You could be expierencing a problem with your monitor screen. try this.... connect another monitor screen to the VGA port of your laptop. Now try booting up. Look for and push Fn + the key that turns on a secondary display. if the monitor screen comes on. you need
another laptop monitor. At least you can use your laptop with the second monitor for now.

enable your onboard graphics and plug your monitor into the onboard. start up your pc and install any needed drivers for the secondary graphics card. right click on your desktop and go to your display properties you should see a faded out screen that has a 2 and a lit screen that has a 1 right click on the faded screen and check enabled then move your monitor cable over to the new vid card right click on the lit 1 and disable it making 2 your primary.

press the Fn and F4 keys at a time just it will switch to single monitor then display will show

Looks like your Power Supply has gone Kaput .. Usually it is the Electrolytic Capacitors on the Power Supply Board, try a new one, or replace ALL the Electros with same or better ones.