Solved External Display is Black

To Sardonicus: How do I go into BIOS? I'll check the Intel Graphics thing with the external monitor now too.

To HoneycombAG: Yes, I did indeed check in Device Manager. There are no exclamation marks on my monitors. :)
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUSTeK Computer INC. M5A78L-M/USB3
OS
Windows 7 Professional 64-Bit
CPU
AMD FX-4300 Quad-Core Processor
Motherboard
ASUSTek Computer INC M5A78L-M/USB3
Memory
8 GB DDR3 Single Channel 2008.8 MHz NB Frequency
Graphics Card(s)
NVIDIA GeForce GT 730 2GB
Keyboard
Standard PS/2 Keyboard
Antivirus
Microsoft Security Essentials, and a couple others
Browser
Google Chrome
Is the monitor lit when you plug in your display (as in, does it display a picture, but show all black, or does it say "No Signal" or "Out of Range")?
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom
OS
Microsoft Windows 7 Home Premium 64-bit Service Pack 1
CPU
AMD A10-6800K APU with Radeon(tm)™ HD Graphics 4100
Motherboard
ASRock FM2A85X Extreme4-M
Memory
(2) G.Skill F3-12800CL10-8GBXL
Graphics Card(s)
ASUS R7 250 Series (0x6610)
Sound Card
Realtek High Definition Audio
Monitor(s) Displays
Acer X213H LCD monitor, 21"
Screen Resolution
1920 x 1080 x 32 bits @ 60 Hz
Hard Drives
WD Black, 1.0TB, WDC WD1002FAEX-00Z3A0
PSU
Rosewill Quark-650
Case
Raidmax Comet SECC Steel ATX Mid Tower Computer Case
Cooling
1 x 80mm + 2 x 120mm + Stock cooler
Mouse
Gear Head Wireless Optical 5-button mouse
Internet Speed
FTTx 6000 / 1000
Antivirus
Avast! Free Antivirus 2015.10.0.2208
Browser
Google Chrome Version 40.0.2214.115
Other Info
*AMD Dual-Graphics
*Uses OpenDNS
*Uses Folding@Home
*HP 16x Super-Multi DVD Writer
*Superspeed 74-in-1 Card Reader
*Maximum overclock has not been determined.
When I plug it in, for a split second, my laptop will flash black on the built in display, but there's no response from the monitor. I can cut the monitor off and back on and it'll say no signal but then go to black. It won't even try to get a picture as far as I'm aware. My laptop simply switches to the settings it would have if the monitor worked properly on my laptop.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUSTeK Computer INC. M5A78L-M/USB3
OS
Windows 7 Professional 64-Bit
CPU
AMD FX-4300 Quad-Core Processor
Motherboard
ASUSTek Computer INC M5A78L-M/USB3
Memory
8 GB DDR3 Single Channel 2008.8 MHz NB Frequency
Graphics Card(s)
NVIDIA GeForce GT 730 2GB
Keyboard
Standard PS/2 Keyboard
Antivirus
Microsoft Security Essentials, and a couple others
Browser
Google Chrome
Checked into the Intel Graphics thing, Sardonicus. It's still a no-go.

Oh, but my external monitor is showing in devices and printers and device manager just fine. I right clicked it in devices and printers and went to troubleshoot. It couldn't find a problem with the monitor even though I can clearly see that the monitor is black. Tested it again today on my old computer and it works just fine so it's still an issue with the laptop itself.

I'm not sure how to go into BIOS still and I'd hate to damage something further. :O
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUSTeK Computer INC. M5A78L-M/USB3
OS
Windows 7 Professional 64-Bit
CPU
AMD FX-4300 Quad-Core Processor
Motherboard
ASUSTek Computer INC M5A78L-M/USB3
Memory
8 GB DDR3 Single Channel 2008.8 MHz NB Frequency
Graphics Card(s)
NVIDIA GeForce GT 730 2GB
Keyboard
Standard PS/2 Keyboard
Antivirus
Microsoft Security Essentials, and a couple others
Browser
Google Chrome
You can also try uninstalling the driver from the device manager. Restart PC.
Install the Intel driver in the link, once again.
Other than that, that's all I can think of.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom Build
OS
Windows 7 Home Premium 64 bit
CPU
Intel Core i7-4790
Motherboard
GA-Z87X-D3H
Memory
G.SKILL 8GB (2 x 4GB) DDR3 F3-10666CL9D-8GBNT
Graphics Card(s)
AMD Radeon R7 250
Sound Card
Realtek ALC892
Monitor(s) Displays
Samsung UN32EH5000, Dell 1703FPT
Screen Resolution
1920 x 1080, 1280 x 1024
Hard Drives
WD5003AZEX
WD10EZEX
Samsung HD103SJ
Samsung 128 GB 840 PRO
PSU
SeaSonic M12II SS-500GM
Case
Fractal Design Define R4
Cooling
Zalman CNPS9900ALED
Keyboard
Logitech K800
Mouse
Logitech M705
Internet Speed
16 Mbps
Antivirus
Avast
Browser
Firefox
Other Info
Bose Companion 2 Multimedia Speakers
Tried that and it's still a no-go. I really appreciate you trying to help me. All of you were so kind! I'm hoping someone else can reply to this thread with some further help like how to go into BIOS or something. I'm still wanting to try to fix this issue. :O Thank you for working with me on this though!
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUSTeK Computer INC. M5A78L-M/USB3
OS
Windows 7 Professional 64-Bit
CPU
AMD FX-4300 Quad-Core Processor
Motherboard
ASUSTek Computer INC M5A78L-M/USB3
Memory
8 GB DDR3 Single Channel 2008.8 MHz NB Frequency
Graphics Card(s)
NVIDIA GeForce GT 730 2GB
Keyboard
Standard PS/2 Keyboard
Antivirus
Microsoft Security Essentials, and a couple others
Browser
Google Chrome
How does one go about testing a VGA port on a laptop with a CRT monitor to check if it's sending out a signal?

You could try different cables ... that is, if the cable in question isn't permanently attached to the monitor in itself.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom
OS
Microsoft Windows 7 Home Premium 64-bit Service Pack 1
CPU
AMD A10-6800K APU with Radeon(tm)™ HD Graphics 4100
Motherboard
ASRock FM2A85X Extreme4-M
Memory
(2) G.Skill F3-12800CL10-8GBXL
Graphics Card(s)
ASUS R7 250 Series (0x6610)
Sound Card
Realtek High Definition Audio
Monitor(s) Displays
Acer X213H LCD monitor, 21"
Screen Resolution
1920 x 1080 x 32 bits @ 60 Hz
Hard Drives
WD Black, 1.0TB, WDC WD1002FAEX-00Z3A0
PSU
Rosewill Quark-650
Case
Raidmax Comet SECC Steel ATX Mid Tower Computer Case
Cooling
1 x 80mm + 2 x 120mm + Stock cooler
Mouse
Gear Head Wireless Optical 5-button mouse
Internet Speed
FTTx 6000 / 1000
Antivirus
Avast! Free Antivirus 2015.10.0.2208
Browser
Google Chrome Version 40.0.2214.115
Other Info
*AMD Dual-Graphics
*Uses OpenDNS
*Uses Folding@Home
*HP 16x Super-Multi DVD Writer
*Superspeed 74-in-1 Card Reader
*Maximum overclock has not been determined.
"CRT monitor"? Do tell!

I'll try other cables next. I have to go into my closet to find them though. (YIKES!) Will post back what happens with that and I'm gonna try a fourth monitor.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUSTeK Computer INC. M5A78L-M/USB3
OS
Windows 7 Professional 64-Bit
CPU
AMD FX-4300 Quad-Core Processor
Motherboard
ASUSTek Computer INC M5A78L-M/USB3
Memory
8 GB DDR3 Single Channel 2008.8 MHz NB Frequency
Graphics Card(s)
NVIDIA GeForce GT 730 2GB
Keyboard
Standard PS/2 Keyboard
Antivirus
Microsoft Security Essentials, and a couple others
Browser
Google Chrome
Extremely late on this but as it turns out the inner wires for the VGA port are actually broken up. All this finally came to light when the screen started falling apart. I'd had the screen replaced before and the repair man said there was one screw missing. One screw did all of this. The laptop is torn up but will still cut on. I have the screen taped so it still shows an image. Some other parts went out in it for various reasons but I have a new computer finally. Sorry if this is necroing the thread but I thought you should know that something like that caused it to stop showing the VGA output.
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
ASUSTeK Computer INC. M5A78L-M/USB3
OS
Windows 7 Professional 64-Bit
CPU
AMD FX-4300 Quad-Core Processor
Motherboard
ASUSTek Computer INC M5A78L-M/USB3
Memory
8 GB DDR3 Single Channel 2008.8 MHz NB Frequency
Graphics Card(s)
NVIDIA GeForce GT 730 2GB
Keyboard
Standard PS/2 Keyboard
Antivirus
Microsoft Security Essentials, and a couple others
Browser
Google Chrome
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