Operating second screen. Laptop to T.V. Screen no picture

Dell Inspiron 15 (3000 series); Windows 8.1

Up to recently no problem linking laptop screen  to TV Screen using HDMl to HDMl cable.
But it wont work any more.
What I have done:
1, Tested it with another,  'brand new' HDMl to HDMl cable.
2. Checked to see that the laptop is enabled for a second screen (F8 and click on Extend)
3. Tried the laptop with another T.V. which has HDMl sockets.

None of these worked.
Michael MurphyAsked:
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JohnBusiness Consultant (Owner)Commented:
Press the F7 key (may depend on laptop)  to activate the screen.
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rindiCommented:
Make sure the TV is set to use the hdmi port you have connected the laptop to. Also, does the laptop recognize the TV when you connect to it? Does your laptop have a slider button (like one of mine with hdmi port has) to enable the hdmi output?
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Joe Winograd, Fellow&MVEDeveloperCommented:
Instead of function keys, try doing it in Control Panel. Run the Display applet in Control Panel and then on the left side click Change display settings. You should see this:

Display settings
Click the Multiple displays drop-down and select Extend these displays. Click OK and that should do it. Regards, Joe
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Michael MurphyAuthor Commented:
Did as advised but no joy.
Control Panel / Display / Change Display settings / Extend these displays (was already selected). I re-selected it and 'ok'ed it.
I notice Buttons at top of Change Display Settings Page: 'Detect' and 'Identify'. When I clicked on 'Detect' it responded 'Another display not detected'.

With regard to Rindi's mention of a Slider. Where might this be found on my laptop? Where should I look?
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rindiCommented:
I don't know your laptop, so I don't know if it has such a slider, nor where it would be. On my laptop it is just next to the hdmi port. Another thing you could check is whether you can enable/disable it in the BIOS.

Then also check your PC's drivers, if it just has a generic driver, and not the one of the video card, it wouldn't recognize it. Look in device manager.
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Joe Winograd, Fellow&MVEDeveloperCommented:
> When I clicked on 'Detect' it responded 'Another display not detected'.

That's OK, Michael, as long as you are seeing the displays numbered 1 and 2, as in the screenshot I posted previously. Are you? And when you click the Display drop-down, do you see both displays in the list, like this:

Display drop-down choices
Regards, Joe
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JohnBusiness Consultant (Owner)Commented:
Dell and Video are more picky than most.

Check for upgraded BIOS, Chipset AND Video and replace any / all of these you can.
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AaronSystems Administrator & DSTCommented:
Does your laptop have a VGA port you can test? Most HD tv's also allow a vga connection and it would let you know if the HDMI has an issue with drivers/bios/enabled or whatever settings or if something is wrong with the port itself physically speaking.
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Michael MurphyAuthor Commented:
Just to note that this all worked perfectly for over a month. That must b taken into account. I did not make any changes to the laptop settings before it stopped working.  I was wondering whether there might b a problem in the hdmi socket in the laptop since it is not the cable. All the laptop settings are the same as when the connection was working?
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Michael MurphyAuthor Commented:
The tv does have a VGA socket and two USB ports. Don't have. VGA cable but will try to get one.
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Joe Winograd, Fellow&MVEDeveloperCommented:
> a problem in the hdmi socket

Definitely possible. I've seen all sorts of ports stop working in computers. Please answer the two questions in my previous post: Do you see the displays numbered 1 and 2? Do you see the drop-down with the two displays listed?
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rindiCommented:
As I mentioned, check your BIOS, you might have unknowingly disabled the HDMI port in there. Or also the driver might not work anymore, maybe an update disabled it.
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Michael MurphyAuthor Commented:
Sorry Joe for being so slow in getting back to you. Not lack of interest I assure you.
1. I  am enclosing a screenshot of the screen which appears when I follow the first of  your instructions. It looks exactly the same as your screen above, the only difference being the 'resolution'. (When I click on OK, however it doesn't work. I check that the TV is set to HDMI 1  and even switch the connection to HDMI 2 on the TV - but it does'nt work.)

2. I an enclosing a screenshot of the display menu dropped down. It is different to the one you posted above. Maybe the answer to my problem is in this.
screenshot.png
Screenshot2.png
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Joe Winograd, Fellow&MVEDeveloperCommented:
Yes, the second screenshot indicates a problem. It is detecting a VGA port, not HDMI. In fact, if you click on the #2 display in the first screenshot, you'll see that it says it's VGA.

Look in Control Panel>Device Manager, and expand two sections: Display Adapters and Monitors. Post a screenshot with those two sections expanded.

Btw, since the second monitor is displaying in your screenshots, you must have it hooked up now to the VGA port — on both the computer and the TV. Of course, it's not going to show the HDMI connection unless you have an HDMI cable connected to both the computer and the TV.

One other thing. Go to the Dell support site:
http://www.dell.com/support/home/us/en/19/Products/

They have so many Inspiron 15 Series 3000 models that I can't help you with a precise link. But at that page, you'll see a box to enter your Service Tag or Express Service Code. Those are unique and will identify your specific model to the site. Then download and install the latest video driver for your machine. Regards, Joe
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Michael MurphyAuthor Commented:
Thanks. I will post as you ask. But something else which may be relevant has turned up. I tried to connect a new printer to this laptop. I began installing the software from the cd. It reached the point when I was asked to connect laptop to printer and switch printer on. Nothing happened. I got message that lapto and printer were unable to connect. I tried it with a different printer and a different cable. Same result!
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Joe Winograd, Fellow&MVEDeveloperCommented:
I assume it's a USB 2.0 printer — right? My first troubleshooting step would be to try all of the USB ports on the computer. Second, try a different (known-to-be-working) device. Third, try a different (known-to-be-working) cable. Since it seems that you did the latter two, and since your HDMI port is not working, and your USB ports are not working, perhaps it's a motherboard or BIOS problem.
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rindiCommented:
If you have a spare HD, I suggest you replace that with the original, then use your Factory restore media to setup the OS (or restore from a backup, or install windows from installation media).

Then check whether your TV works, and if the printer also works. If they don't, you have a problem with your hardware that is probably not fixable without replacing the mainboard, which is probably more expensive than a new PC. If both work, your OS has been seriously corrupted. You might be able to fix it by opening an elevated CMD prompt and entering SFC /Scannow. But it might be a better idea just to start fresh.

If you don't have a spare disk, you can also try a live Linux distro to check whether your TV and printer can be used, like Knoppix:

http://knoppix.net
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Michael MurphyAuthor Commented:
I am posting expanded 'display' and expanded 'monitor' in Device manager below. As this laptop is under guarantee I am going to get on to Dell to see what might be done.
screenshot3.png
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rindiCommented:
Something that you might also want to look at, many laptops have 2 integrated GPU's, one an intel type that is used for low-end and low power usage, and those don't always have all options available, and an nVidia GPU for higher end, high power usage. Often there is a button or switch where you can go from "economy" to "power" mode, or there is a tool installed which you use to switch the modes. Maybe you have to turn on your nVidia GPU that way. You should then also have the nVidia control center installed from which you enable and configure your external displays.

This of course won't address your issue with the printer, should your USB ports not be working.
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Michael MurphyAuthor Commented:
Problem Solved. All working. I downloaded chipset and bios files from the Dell website and everything worked after I had done this. Thanks to all of you - each of you advised this course at some stage, so thanks again.
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JohnBusiness Consultant (Owner)Commented:
@Michael Murphy - You are very welcome and I was happy to help.
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Joe Winograd, Fellow&MVEDeveloperCommented:
You're welcome, Michael. Happy to help and very glad to hear that everything is working now. Regards, Joe
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