Cannot display to external screen

YOUR WINDows is nt orignal..its pirated thats y black screen is displayed..please chnge the operating systm wid a real produt key otherwise buy it......
Thank u

Re-boot the laptop. Verify that the "POST" operation comes on during the restart - if not then you have a graphics issue in the laptop.

The HP DV series or laptop are known to suffer from GPU faults and issues. The syptoms you describe indicate such a fault. To help isolate the fault you will need to try plugging the laptop into an external screen when it is powered off, Power the laptop up and if the GPU is healthy it should display fine on the external screen leaving us free to look at other issues. If it does not it likely your GPU is at fault. If this is the case you would either need to undertake re-ball/reflow repair on the GPU, which is best done by you local repair shop unless you have the tools/skills to perform such tasks. Alternatively replacing the mainboard in the laptop could be an option.

Let me know if you try an external monitor. If it does display I will try to guide you through testing for other faults and issues.

this is not a pc problem... this is because the connection loss between pc and monitor... not all pc's have sleep mode in externa vga connection.... it just cuts power off... u can configure monitor of possible to do that..

Usually the external monitor and laptop screen toggles in one of three states.
LCD only
External monitor only
Both LCD and external monitor
Wait a couple of seconds between when you press Fn F8
This model laptop may not allow ectended display.

A) Post THE Product Number on the bottom of the laptop. It's in the white Service Tag. P/N = Product Number.

B) On the left/bottom side of the LCD screen frame (Display Bezel), there is a switch. Looks like a small button.

This is the Internal Display Switch. (May not be in this exact position for your model. Look around on the Display Bezel, that surrounds the LCD screen)

When the laptop is closed, the switch turns off the display, (Image on screen), with the computer still on.
Tap it a couple of times lightly, with the eraser on the end of a number 2 pencil.

See if anything happens. That switch may be bad.

C) Laptop off, monitor off, connect a VGA monitor to the VGA port on the laptop.

Example of a VGA cable, and VGA connector, (Port),

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

You can use a CRT monitor, (Looks like a small TV), or a flat LCD screen monitor if it has a VGA cable.

C) Turn the monitor on. If a CRT type of monitor allow it to warm up.
Turn the laptop on.

By factory default settings, the display should show on the external VGA monitor.

IF not;
There are at least 3 display options,

1) Internal monitor of laptop ONLY
2) Internal monitor AND external VGA monitor
3) External VGA monitor ONLY

Press, and hold down on the Fn key. At the same time tap once on the Display Toggle-Over key.

Don't know what exact HP laptop you have. For most HP's it is the F2 key, or the F4 key, that is the Display Toggle-Over key.
(Key has an empty rectangle on it, with a vertical line on each side)

Still no display on the external VGA monitor?
Hold the Fn key down again. (Bottom left of Keyboard)
Tap once more on the Display Toggle-Over key

NO display on the external VGA monitor, means you have a bad graphics chipset.

(By using an external VGA monitor, you are bypassing the Internal Display Switch, and the Display Assembly. (Internal monitor of laptop)

If you have a display on the external VGA monitor, you have a problem with;

1) Video Cable, (Display Panel Cable for HP)
or
2) Display Assembly

Post back with your results, and if you have a display on the external VGA monitor, we will go on.

If you do not have a display on the external VGA monitor, you are looking at motherboard replacement.

Post back in a Comment.

Regards,
joecoolvette

Make sure the vga cable is in tight on the kav-60 and the external monitor.

Try the keystrokes to toggle the display. Normally you would Press and Hold the FN function key located at the lower left on the keyboard then hit the key F1 thru F12 that toggles the display. The correct F1 thru F12 key to hit will have LCD/CRT on it or it will have the icon of a display. The display toggles in three stages ( laptop only, external only or both laptop and external).

If the screen still doesn't display properly when connected to an external monitor, then there is probably a problem with the graphics chip on the motherboard. This can usually be repaired, but you'll still need to use the external monitor unless you get the screen replaced as well!

Have you followed the Guided Troubleshooting steps provided on the HP Support web site?

These will take you through a series of checks and decisions to try to isolate the cause of the problem along the following lines:

1. Are you sure you are plugged in to a good power outlet - can you plug a lamp in and does it work?

2. Are you sure that you are using the right power adapter for this laptop, is it the original HP block supplied with the laptop or is it a replacement - if the latter, then does it supply the correct output voltage and watts required by the laptop.

3. Are you sure the problem is not just the laptop display being dead, i.e. have you tried attaching an external display, do you get any leds light on the laptop for power, disk activity etc?

4. Have you tried removing the battery from the laptop and connecting the power adapter with it removed to prove that the battery is not preventing the laptop from powering on?

5. Have you disconnected all external devices from the laptop, in particular docking station, printers, USB devices etc to ensure that no external device is preventing it from powering on?

6. Do you have another power adapter that you can try using - are there any lights on the power adapter to show that it is working?

I would like you to try using HP's Part Surfer.

1) Put your Product Number, or Serial Number in the Quick Search box,
(P/N = Product Number.
S/N = Serial Number.

{DO NOT give out the serial number on a public forum such as this. Only on the HP website}

2) Then click the blue down arrow on the right side of the - Select a country or region - box, and click on your country.

3) Finally go back to the Quick Search box, and click on the side arrow to the right.

Post back in a Comment as to your findings.
We'll go from there.

On the back of the LCD screen is the HP part number.

http://www.screentekinc.com/HP_Pavilion_DM4T--14-inch--1366x768-wxga_hd-laptop-lcd-screen.shtml

{Scroll the page down, and see if any of the 36 part numbers may be a match}

Display LCD screen replacement instructions,

http://www.insidemylaptop.com/disassemble-hp-pavilion-dm4-laptop/

http://www.insidemylaptop.com/replace-lcd-screen-hp-pavilion-dm4-laptop/


Awaiting additional questions. Please post in a Comment.

Regards,
joecoolvette

[ P.S.
You can disconnect the LCD display, and use an external VGA monitor, while you wait for the replacement LCD screen.

1) Laptop off, VGA monitor off.
2) Connect the VGA monitor to the Left side of the laptop.
( External monitor port. The VGA connector resembles this one,

http://en.wikipedia.org/wiki/File:SVGA_port.jpg

3) Turn the VGA monitor on. Wait for it to 'warm up'.
Turn the laptop on.

If the display does not automatically go to the external monitor;
Press, and hold down on the Fn key.
Tap the F4 key.

(The VGA monitor can be a CRT monitor, {Looks like a small TV}, or a flat LCD screen monitor that has a VGA connector, and a VGA cable ]