External Monitor (TV) causes HP nx9420 to rest screen display

The laptop can be in the external monitor mode or the white lite for the laptop screen is bad.

Connecting an External Monitor or Data Projector
You can switch to an external monitor or data projector by two methods. 1. Connect the external monitor to the laptop's video port, power up the external monitor first and the laptop. The video information will automatically switch to the external monitor. 2. If you power up the laptop first then you can switch the video output to the external monitor by pressing the Fn key and one of the Function keys, depending upon your make and model laptop. You can also toggle between the external monitor or both LCD screen plus the external monitor or back to LCD screen only by pressing the Fn key plus one of the function key. Here is a list of key combinations for some of the laptops :- IBM ThinkPad = Fn + F7 HP and Compaq = Fn + F4 Toshiba = Fn + F5 Dell = Fn + F8

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

Hi Judy,

The Compaq Presario x1000 notebook offers connections for external displays at the rear below the screen hinge as show in the picture below:



Identifying the back from left to right: Ventilation slots, External VGA Port, S-Video Port, USB Port, USB Port, RJ-45 Network Jack, RJ-11 Telephone Jack, Parallel Printer Port, USB Port and 1394 (a.k.a. "Firewire") Port.

You can connect a VGA monitor to the VGA port (blue colored jack) very easily. Any analog VGA monitor should readily connect to it. Additionally, the x1000 can output its display to TV or other monitor that accepts "S-Video" signals. An "S-Video" cable will be needed to connect between the "S-Video" jacks on the notebook (next to the VGA Port) and one on the TV. It is important to note that not all TVs support both or either "S-Video" or VGA inputs. When ever the there is a choice of using S-Video or VGA on a TV or monitor, the VGA will provide the best looking picture, and should be used.

I hope this helps and good luck! Please rate my reply - thanks.

Hello,

the fault might be from the screen flex or screen inverter.

To confirm this, connect your hp laptop to an external monitor and if there is a display, then the screen inverter or flex is the cause of the problem and it needs to be replaced for there to be a display on your hp laptop screen again.

But if there is no display when you connect the hp laptop to an external monitor, please let me know.

Take care.

Hello,

the fault might be from the screen flex or screen inverter.

To confirm this, connect your hp laptop to an external monitor and if there is a display, then the screen inverter or flex is the cause of the problem and it needs to be replaced for there to be a display on your hp laptop screen again.

But if there is no display when you connect the hp laptop to an external monitor, please let me know.

Take care.

This issue could be due to presence of static charges on the notebook or hardware malfunction of the display screen or defective video card on the notebook. To isolate the exact cause of the issue, perform the following steps.

Step 1: Hard Reset

1. Unplug the AC adapter from the notebook PC and remove from any port replicator or docking station.
2. Remove the battery from the notebook battery compartment.
3. Press and hold down the power button for about 20 seconds.
4. Insert the battery and plug the AC adapter back into the notebook PC.
5. Press the power button to turn the notebook PC back on.

This will discharge the static charges from the notebook. Now check for the issue. If the issue persists, then connect an external monitor to the notebook and check for the issue on it.

Step 2: External Monitor

You can follow the steps below to connect an external monitor to the notebook.

1. Turn off the notebook.
2. Connect the monitor cable from the external monitor to the monitor port on the rear/side of the computer.
3. Connect the monitor to a power source and turn it on.
4. Press the Power button to turn on the computer.

At this time, please follow the instructions mentioned below for switching the display to the external monitor:

The notebook's video card supports three modes. Built-in screen only; external video only; and both on simultaneously (mirrored). If you're not seeing the image on the desired device(s), the notebook's video card is probably in another mode. Press FN + F4 to cycle through the display options: Notebook display, External monitor, both.

If you press FN + F4 once, the external monitor will display & there will be no Notebook LCD display.
If you press FN + F4 twice, the external monitor will display & there will be some shading on the Notebook LCD.
If you press FN + F4 thrice, both Notebook LCD & external monitor will display.

If the issue persists on the external monitor, then this could be due to defective video card on the notebook. However, if the display on the external monitor is fine, then the issue is with the LCD display panel of the notebook. In either cases, the notebook requires a detailed onsite diagnosis by a service technician.

If your notebook is covered under the HP warranty, then I would suggest you to contact HP to get the notebook repaired under warranty from HP.

You need to:

- Connect everything with the laptop turned off
- Boot the laptop
- Use the Fn key plus F8 or F9 (I'm trying from a small picture of the keyboard!) to cycle through the external display options.

Suggestion- on my toshiba fn-f5 switches display modes, but to remove display connectors, you may have messed up your keyboard ribbon cable connection. it probably has a small sliding lock to hold it in place- if the lock isn't tight, your keyboard may not be recognized, which could mess up your display. Also, make sure your battery is charged and/or your power supply to your laptop is connected. hope this helps!

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can't.....the res for the tv supported is too low.