Question about Compaq Presario CQ56-115DX Laptop

1 Answer

External monitor has no input signal

Attached external Iqon monitor to comaq Presario cq56 laptop but getting no input display on monitor..please help

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 247 Answers

You can't just attach an external monitor to most running laptops. Nothing will happen. You must attach the monitor when the laptop is off, then start the laptop and it will recognize the external monitor and send the video to it.

Posted on May 08, 2014


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

  • 4044 Answers

SOURCE: when i conect my

You have to hold the Fn key and then press F4. There should be 3 settings. Setting 1. Computer Monitor. Setting 2. Computer Monitor and External screen and setting 3. External Screen only. The order changes sometimes but pretty much all laptops follow this sequence in some way.

Posted on Nov 26, 2010

SOURCE: How to reset a compaq

Restart the laptop and keep tapping f11 key until Recovery Manager window comes up.

Under I need help immediately, select System Recovery

Click next then follow online instructions.

Posted on Jun 02, 2011

  • 66 Answers

SOURCE: I need Help Installing additional ram on my compaq

Power down your laptop and remove A/C adapter and battery. Be sure to ground yourself to prevent static electricity transfer. Small panel in the middle of bottom of laptop. Remove screws and laptop RAM is right there. Be sure your RAM matches as far values and doesn't exceed maximum size supported. There should tabs that hold the RAM in. Replace pieces of RAM. Computer should recognize the new hardware and acknowledge it when you power it up. Hope that helps..

Posted on Jul 15, 2011

SOURCE: how do i turn on

This laptop does not have a numblock key, because the keyboard does not feature a dedicated number pad like most desktop keyboards!

Posted on Sep 12, 2011

  • 6771 Answers

SOURCE: Compaq Presario CQ56-115DX shows a blank screen on boot, but runs perfect on external display

Yes! it is the inverter board or the backlight behind the display that is the issue.

Posted on Mar 25, 2012

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Presario cq56 laptop have no display

Plug in another monitor on the monitor output - if that monitor works then the problem lies with the laptop display. If the external monitor does not work also then the anomaly lies with the video circuits of your laptop. In either case , repair is expensive and not cost effective - better off just getting another computer.

Jun 19, 2015 | Compaq Presario Notebook

1 Answer

How do i get my presario cq56 to show extended display to work on multiple screens?

Right click the desktop and get to display properties. Might have to use the fN key and to enable the external monitor VGA port.

May 12, 2014 | HEWLETT-PACKARD Compaq Presario CQ56-129NR...

1 Answer

Compaq turns on cap locklight on f12 light on and power light on black screen

Have you tested this laptop using an external monitor? If your laptop works good with an external monitor, it means your laptop screen is dead and needs to be replaced. If the external monitor displays black screen , it means there is something wrong with the GPU and or motherboard.

Mar 10, 2014 | HEWLETT-PACKARD Compaq Presario CQ56-129NR...

1 Answer

Iqon external monitor showing no input from Compaq laptop

Dear Darren,

In general, you need to select which output display to use, when you have more than one display connected to the laptop.

This can be done by pressing and holding the fn in the lower left hand of your keyboard and then pressing F4. Doing this repeatedly will switch from the laptop display to the external display to image on both displays.

Hope you may find this information helpful!

Best regards,

Miguel L. Martins

Feb 13, 2014 | Compaq Presario CQ56-115DX Laptop

1 Answer

Trying to connect iqon monitor to input signal

In control panel select display and select 2nd monitor as default

Feb 13, 2014 | Acer Computers & Internet

1 Answer

Iqon no monitor

check external monitor through vga

Feb 13, 2014 | Compaq Computers & Internet

2 Answers

Compaq Presario CQ56-115DX shows a blank screen on boot, but runs perfect on external display

If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :-

Mar 24, 2012 | Compaq Presario CQ56-115DX Laptop

1 Answer

Laptop screen blank all white

Either your LCD Video Cable is not plugged in snuggly or the monitor is slowly going bad. The fact that you can see the images on an external monitors says your Video Graphics Card is working fine. You'll need to disassemble the laptop to get to the cables. Get a quote from your local computer shops, then try the guys at: Most times they will fix it and ship it back by Fedex or UPS cheaper than any quote you obtained including the shipping.

Mar 15, 2012 | Compaq Presario CQ56-115DX Laptop

1 Answer

How do i turn on number lock with a comaq cq56

This laptop does not have a numblock key, because the keyboard does not feature a dedicated number pad like most desktop keyboards!

Feb 11, 2011 | Compaq Presario CQ56-115DX Laptop

Not finding what you are looking for?
Compaq Presario CQ56-115DX Laptop Logo

Related Topics:

78 people viewed this question

Ask a Question

Usually answered in minutes!

Top Compaq Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18424 Answers

Alun Cox

Level 3 Expert

2678 Answers

Lee Durbin
Lee Durbin

Level 3 Expert

408 Answers

Are you a Compaq Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides