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I have a pavillon a6421 uk hp computer when i turn it on the monitor comes up with no vga signal (i have changed the graphics card and it is still the same) have done all the trouble shooting options but nothing works can any one help please thanks simon

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Hi

First Check the power cable of ur monitor whether power is coming or not..

Then remove signal cable (which is connect the cpu) and then switch one the power, check whether any msg is coming in screen.(like no signal or no connection) if it comes means u want to check the cpu or else their is problem in ur monitor..

Connect the another monitor with ur cpu.Whether ur cpu is working properly..

Posted on Sep 19, 2008

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When I put my computer on it comes up with scanning no signal and the screen stays black with the little light in the corner is yellow but sometimes leaving the computer on by itself


The monitor is stating that there's no signal from any device. It could be that the monitor cable is unplugged from the back of the tower, or the graphics card could be bad. "Scanning" suggests you're using a smart TV rather than a monitor. In that case, you may need to change the setup type to VGA, DVI, HDMI or whatever type signal the computer sends.

Oct 18, 2015 | HP Pavilion PC Desktops

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How do I fix the error no vga input signal no dvi input signal monitor going to sleep


Check if you VGA is properly settled in the PCI slot. Try to take it out, clean the slot for dust.
If that doesn't help, it is well possible that you VGA is not working any more.

Jun 10, 2012 | HP PC Desktops

1 Answer

I have a Dell Inspiron 531S, I have both two different monitor slot, does my PC support dual monitor systems?


Yes.

The area on the back of the computer, that has two ports to connect a monitor, is a Graphics Card.

It is a PCI-Express graphics card, and is plugged into a PCI-Express x16 slot on the motherboard.
(Expansion Slot)

It has a blue VGA port, white DVI port, and black S-Video port.

The area on the upper left with a blue outline around a VGA port, is a VGA port connected directly to the motherboard. It is Integrated Graphics.

You CANNOT use Integrated Graphics, and a graphics card at the same time.

It's either use the Integrated Graphics VGA port, OR use the graphics port/s on the graphics card.
BIOS will Not support using both Integrated Graphics, and a graphics card.

HOWEVER, you can use the VGA port, and the DVI port when using two monitors.
You will be only using just the graphics card.

Example of a VGA port, (Connector), and VGA cable,

http://en.wikipedia.org/wiki/VGA_connector

Example of a DVI port, and DVI cable,

http://en.wikipedia.org/wiki/DVI_connector


1) Whatever monitor you have that has a VGA cable, plug it into the blue VGA port on the graphics card.

(There are VGA monitors {CRT} that resemble a small TV. VGA cable is usually attached.
There are also LCD flat screens that have a VGA connector, for a VGA cable, and may also have both a VGA, and a DVI connector.

To digress for a moment;
VGA is Analog. It uses an Analog video signal.
DVI is digital. It uses a Digital video signal.

A computer naturally puts out a digital video signal. This digital signal has to be converted by the computer, into analog for an analog monitor. This slows the graphics process down. This is one reason it is best to use digital )

2) Plug a monitor with a DVI cable into the white DVI port on the graphics card.

3) Turn the monitors on.

4) Turn the Inspiron 531s on.

5) When Windows has loaded, right-click on an empty area of your desktop computer screen.
Now left-click on Properties at the bottom of the list.
Left-click on the Settings tab.

6) You are now looking at a small window that has two monitor icons in it.
Monitor 1 icon, and monitor 2 icon.

Monitor 1 icon is your Primary Display.
Monitor 2 icon will be for the Secondary Display you are adding.

Note how monitor 1 icon is sitting to the Left, and monitor icon 2 is sitting to the Right.
This is how your monitors are supposed to be arranged on your computer desk.

If the second monitor is on the Left on your computer desk, you need to move the icons around.
Move monitor 2 icon to the Left.

Left-click on the icon, hold the left mouse key down, and drag the monitor 2 icon over to the left side of monitor 1 icon. (All the way over, or it will snap back to where it was)

It may matter to you how your monitors are arranged. It may not. Once you read the following it may help you decide.

7) Left-click on monitor icon 2 if you have not already done so.
Go down to where it states, "Extend my Windows desktop onto this monitor"

8) Left-click once in the empty square, to the left of Extend my Windows desktop onto this monitor.

9) Now left-click on Apply at the bottom Right corner.

10) Finally left-click on OK at the bottom Left corner.

You should now see your desktop screen on both monitors.

When using the internet on both monitors, you have to drag the screen from the Primary monitor to the Secondary monitor.

Go to the left side of the screen. Left-click right on the edge of the blue frame. Hold the left mouse key down after you click, and drag the screen across to the left.

Doesn't work?
Go to the right side, click on the blue frame, and drag the screen to the right.

This is why it may matter how the monitors are arranged on your computer desk.

It's kind of eerie your first time dragging the screen across.

You will also find out why it is best to use two similar monitors, when using dual monitors. The pixel resolution is different for both monitors, if they are different from each other.

For additional questions please post in a Comment.

Regards,
joecoolvette

Just to add:

http://support.dell.com/support/edocs/systems/inspd531/en/OM/appendix.htm

Aug 15, 2011 | Dell Inspiron 531s Desktop Computer

1 Answer

When I turn my computer on, my monitor displays a message of 'vga signal, no vga input signal' and 'dvi signal, no dvi input signal' and 'monitor going to sleep'. My cables are...


The symptoms you described is common in fault mobo or VGA card.But VGA doesn,t turn bad so easy.I suggest to change your mobo first.

If you need more help post back!
Thumbs and testimonial are welcome!

Aug 15, 2011 | HP dx2300 Monitor Personal computer Intel...

1 Answer

Ok, I changed my video card ( hp: p6230f) I still have no signal in your opinion would you go with monitor failure or motherboard? I have also checked all connections. Soon as I turn it on it scans reads...


1.If your display come during start up windows then its problem with graphic settings.
2.check moniter with another pc if its work on that pc then its your card problem.

In the case of 1 you have to go in safe mode and change the graphic setting.you have to change frequency hertz from advance setting to 60hz or 75hz which is mostly compatible with all moniters.And restart pc.you also check display driver correctly installed.

in the case of 2 problem change card or connec it with built in vga card and check your graphic card with another pc.you should find what is problematic by follow these steps.

Jul 13, 2011 | PC Desktops

1 Answer

Just received Refurbished Advent CBE 1401. It is being replaced because power switch is faulty - but I have questions about machine. 1. When initially switched on the switch turned red is this normal? I...


1) No. The switch color should have been Green

2) No Signal on the monitor, indicates the monitor is not receiving a Video Signal from the computer.

A) Could be due to a faulty monitor cable.
Monitor cable is used on a working computer for a test,
Or,
working computer's monitor cable is used on the Advent for a test.

B) Could be due to the graphics 'engine' on the motherboard, or on the graphics card is bad.

[Graphics 'engine'.
GPU
Graphics Processing Unit.

http://en.wikipedia.org/wiki/GPU ]

If the computer is using Integrated Graphics, the GPU is on the motherboard.

(Integrated Graphics is also referred to as OnBoard Graphics. Meaning On the motherBoard)

You will know if it's Integrated Graphics, because the monitor cable will be plugged into the VGA connector, on the motherboard

http://en.wikipedia.org/wiki/VGA_connector

Since you indicate an adapter was included, to adapt to a different port (Connector), it could be a VGA to DVI adapter, or a DVI to VGA adapter.

Your monitor may just have a VGA connector on the monitor cable.
Hence you would use a female VGA to Male DVI adapter.

Your monitor may be an LCD flat screen monitor, and has a DVI connector on the monitor cable.
Hence you would use a female DVI to Male VGA adapter.

DVI
Digital Visual Interface

http://en.wikipedia.org/wiki/Digital_Visual_Interface

VGA monitors are Analog.
LCD monitors are Digital.

A computer puts out a digital signal.

If a VGA monitor is used, the computer has to alter the Digital signal to an Analog one.
This slows down the video signal.

If your monitor (In any case. Not just this one), is an LCD flat screen monitor, it is best to use a DVI monitor cable, and plug into a DVI port on the computer, if available.

If your monitor is a VGA (CRT. Cathode Ray Tube), monitor, and you have a DVI connection on your computer, using the adapter will do you no good.

The adapter just uses the contact pins for VGA, that are present in that DVI adapter, and hence the DVI connection on the computer.

You're still just getting an Analog VGA signal.

Example of a female VGA to male DVI adapter,

http://www.directron.com/dvi.html

If the Integrated Graphics are suspected to be bad, a graphics card is used in the appropriate expansion slot, for a test.

If the graphics work then, the graphics card is left in service.

After I test the monitor cable my next procedure is to suspect the Power On switch, or the Power Supply, and go to the graphics next.

The reasoning is that Power Supply failure, is the number one cause of computer failure.
The next is the Power On switch, then Electrolytic Capacitors used on the motherboard.

(Specifically, any Electrolytic Capacitors used in the motherboard Voltage Regulator Circuit)

If the Power On switch is bypassed, the diagnosis will reveal if the problem is the switch, or Power Supply.

Bypass the Power On switch, and the Power Supply comes on?
Problem is the Power On switch.

[One Power On switch I have found to fit a lot of computers. The Power On switch goes into the plastic Power On button,

http://www.directron.com/atxswitch.html ]

Bypass the Power On switch, and the Power Supply does Not come on?
The problem is the Power Supply.

The Power On switch is bypassed using a jumper wire, from the green Soft Power On wire, to ANY black Ground wire. The contact made is a brief momentary one.

The jumper wire is used at the back, of the 20, or 24-pin ATX main power cable connector.

To be continued in an additional Comment.


Jun 04, 2010 | PC Desktops

2 Answers

Hp no signal input


Hello,
If you have changed the monitor and the same thing happens, then you are very likely to be having with you display/graphics adapter. Try changing it with a working one and see the results. This should fix your problem.

All the best.

Jan 14, 2010 | PC Desktops

1 Answer

PC to tv VGA cord hookup. Installed but it said it has no single, will be used as main monetor. Workes but I ca'nt use my keybord to try to get single to tv. a1600n has onley one VGA port and nothing else...


First idea to try: make sure the TV is on (saying no signal) before you turn on the computer. Several TV/monitor units will not respond if the computer is already on when the TV is turned on. Check that you have a good cable (they do fail) and well-seated connections. Then double check that your VGA port is sending a signal out; use another monitor to check. You may have to change your BIOS or graphics card settings. If no signal at the port, you should also check, if using a graphics card, that you have sufficient power to the card from your power supply and it is well-seated in the slot.

I hope this helps.

Cindy Wells

Dec 20, 2009 | HP Pavilion a1600n (882780776265) PC...

1 Answer

Cpu says no input vga signal, then goes to sleep


The no input VGA signal just means that the monitor is not receiving anything from the graphic card on the tower. Is the card a digital (DVI) output card? You'll know by the connector, it's white and slightly wider than a standard VGA connector. If so, perhaps the monitor is set to the wrong input?

If that isn't the case, and the computer is using an on-board or built-in graphics controller, you could try resetting the system's CMOS settings by setting the clear-settings jumper on the system board, or simply remove the plug and CMOS battery for a few minutes. Check the computer's documentation on the exact steps to do this.

Hope this helps!

May 19, 2009 | HP GX613AA Pavilion A6300F Desktop PC

2 Answers

I have a HP s3020n slimline the pc is running but not sending any signal to the monitor


Well... try un-plugging the VGA cable... ie., the monitor cable behind the tower...... if u get a message on screen saying No VGA Input... can confirm there is no issues with the monitor...

if you are using graphic card in computer unplug that and connect the VGA cable to normal display card came along with the computer and try...

or if you have another monitor... u can try connecting that to the tower which is not sending the signal to monitor and try....

even then you get the same problem... get an new graphic card... (if you dont have other monitor try with new graphic card)

Aug 24, 2008 | PC Desktops

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