Connect Your Laptop To An External Monitor And Check Does The Monitor Show Any Picture

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Connect it to an external monitor and check does the monitor show any picture.

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How to connect and troubleshoot a laptop with an external monitor

Here I will show you how to connect your laptop to an external monitor. You will need a cable for this purpose. There are four types of cables: VGA, S-Video, HDMI and Display Port. 

How to connect a laptop to a monitor with a HDMI cable.

Here is an example of a HDMI cable. 

Here is how a HDMI port looks on a laptop.

And here is how a HDMI port looks on a monitor. 

Usually when you connect a HDMI cable from a laptop to a monitor the laptop will recognize this and will put an image signal through the port. If this does not happen please restart the laptop. You can also try to close the laptop’s lid, but make sure that when you do this it does not go to sleep. 

The good thing with HDMI cables is that most of the time the laptop and monitor will talk to each other and configure themselves, so you do not need to do anything at all.

How to connect a laptop to a monitor with a VGA cable. Your laptop in this case should have a port that looks a bit bigger than a HDMI port. 

Usually it has a blue or black center with small pinholes. I recommend shutting down the laptop first and then connecting it to the monitor. 

Some laptops have only a VGA port; this would be true for the older ones. Some laptops have both a VGA port and a HDMI port. And some laptops, the newer ones, have a HDMI or a mini Display Port. 

How to connect a laptop to a monitor with S-Video cable.

There is also one port that is almost forgotten, and you can use it when troubleshooting a laptop’s screen, which is S-Video.

A laptop with this port needs to be connected to a TV or a monitor that has composite video input or S-Video input. You will need to get a cable that has an S-Video plug on one end and composite video (RCA plugs) connector on the other end or S-Video plugs on both ends. There are also cables that have S-Video on one end and SCART (it’s a big rectangular-shaped plug) on the other end. Please check your TV or your monitor - do they have a SCART or do they just have a composite video input? Sometimes a TV has S-Video input but it is so rare that your TV will most likely not have one. 

How to connect a laptop to a monitor with a Display Port cable.

This is pretty straightforward. Usually new laptops have a mini Display Port.

Monitors have a Display Port, so you will need a cable with a mini Display Port plug at one end and a Display Port plug on another end. There are also cables converters from mini Display Port to HDMI. 

How to troubleshoot a laptop screen with external monitors

After you’ve connected the laptop to the external monitor and both are running tilt the laptop’s screen a little and observe what’s going on with both screens. If the laptop screen gets lines or flickers when you move it, this indicates that the video cable inside the laptop is broken. Sometimes this can also be a faulty LCD screen inside the laptop, but almost always this is the video cable that connects the laptop motherboard with the LCD screen inside the laptop. The LCD screen is the device that displays the picture.

If the laptop does not show anything at all and the external monitor shows a perfect picture it indicates that most likely the backlight in the laptop screen is gone. 

If the laptop does not show anything at all and the external monitor does not show anything at all this indicates that something is wrong with the laptop motherboard. If the laptop has an nVidia or AMD graphics card it’s likely that they are faulty.

There is a lot of information about this kind of fault. Some companies like Apple even offer an an extended warranty for laptops affected by this fault. Please check with your laptop manufacturer with regards to whether it offers any extended warranty. 

If the laptop shows some gibberish on the screen and the external monitor shows the same gibberish this means that again the graphics card (or graphics chip) has a fault. On most laptops the graphics chip is soldered onto the motherboard, but on some rare laptops it is actually plugged into a slot like memory modules. 

If the laptop shows a distorted image or gibberish and the external monitor does not show anything at all, I recommend checking whether the drivers are up to date. Sometimes Windows operating system uses its own drivers when there are no laptop manufacturer drivers provided. Then, sometimes you can get unexpected behavior like the external monitor not working, a distorted picture on the laptop’s screen or very low resolution picture. All of this is most likely because of the lack of drivers.

One or more lines on the screen indicates a faulty LCD panel. LCD stands for Liquid-Crystal display. Sometimes these screens are referred to as LED screens. They are the same as LCDs but with LED usage for lighting. 

You are on a page that is part of Computer Troubleshooting Guide. If you have arrived here not from the start I suggest you click here and start from the beginning. The software will ask you some questions and it will try to solve your computer problem.

If you arrived here from the start please continue as normal. 


Computer Repair User Guide

Troubleshooting Computer Problems

How To Fix Computer Problems

Maintenance And Repair

Fix A Slow Computer

Remove Virus

Network Repair

Hard Drive Repair

Computer Repair Tools

Computer Help

Computer Repair Course

 Computer Repair Lessons Continued: 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120


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