Question about HP Pavilion zv5235us PC Notebook

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HP notebook screen/hibernate switch

Hi,
System starts normally then lcd blakccs out. works fine with external monitor and 'blinks' when I push 'sleep mode' button.
Is there a fix?

Thanks.

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  • bluespirit Apr 23, 2008

    Hi,

    Thanks, but I've been told that it is the button that puts the system into sleep mode. the lcd works for a few seconds when I push the button, then goes black again.

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You may have a bad inverter or LCD backlight CCFL tube. This is definitely hardware related.

Posted on Apr 23, 2008

  • Richard Wilbur Apr 23, 2008

    Well, if it truly was the button that puts the system into sleep mode, then it would not work with an external monitor. Your computer would most likely not even come out of sleep mode or if it did, when you fiddle with it, it would go right back to sleep and windows would give you a message telling you that.

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Hp g60t went into hibernation last friday it wouldn't come out of hibernation so i had to hold in the power button and shut down. laptop turns on but no video now the screen stays black. i tried a reset...


This issue could be due to presence of static charges or internal hardware malfunction of the notebook. To isolate the exact cause of the issue, perform the steps provided below.

Step 1: Hard Reset

To perform a hard reset, please follow the steps listed below:

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 turn on the notebook and check for the issue. If the issue persists, then remove and reseat the memory modules of the notebook and check for the issue.

Step 2: Remove and Reseat the Memory Modules

You can refer the service manual provided below for information to remove and reseat the memory modules of the notebook.

http://h10032.www1.hp.com/ctg/Manual/c01602064.pdf

Refer page no: 52 & 53
NOTE: PDF manuals require the Adobe Acrobat Reader for viewing and printing.
Further, if the issue persists after performing the above steps, then the issue could be due to hardware malfunction of the video card or defective LCD display screen of the notebook. Hence, I recommend you to connect an external monitor to the notebook and then check whether the display works fine on external monitor or not.

Step 3: External Monitor

You can follow the steps listed 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 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.

I believe the information provided would be helpful to isolate the issue with your notebook.

Jun 07, 2010 | HP G60t Notebook

1 Answer

No display at startup but showing all lights


First we need to test if the problem should be the LCD screen. The easiest and most foolproof method for testing your lcd screen is to hook up the laptop to an external monitor. If the video output on the external monitor looks fine, this means that the problem is with the video connector, with your LCD panel itself, or with the circuitry that turns on the LCD.

Second we need to disassemble the laptop and find the video connector
on the system board (if the video is integrated on the motherboard) or on the video card that is attached to the motherboard. Try re-connecting the cables. You may as well locate the display connector on the back of the end LCD panel. Re-seat that one too. This way you can be sure that the problem is not related to connections.

Every now and then the switch located on the system board that turns the back light of the LCD on and off can become stuck. If this is the problem then your LCD never powers on. There's a little switch that detects whether the screen of your notebook is open or closed. That's the one we're talking about. Try to push it down and hope it gets unstuck.

Disassembling the laptop to unstick this switch is an option, but sometimes you can get away with not taking it apart. Try lightly hitting that plastic switch. But wait, this isn't the only possible cause, unfortunately. Re-seat the other connectors and cables that are present around the LCD panel and the video on board (including the inverter)

Dec 09, 2009 | HP Compaq 6735s Notebook

1 Answer

Ma acer aspire 5738z does not start at all. the power on led nd the on/off buton light glows but the scree remains black. when i last left the comp i put it to sleep nd it went 2 sleep after installing new...


When you plug the DC power adapter and press on the power button, the laptop starts making normal noises, the LEDs work properly but noting appears on the screen. The laptop will not start.
First of all, take a closer look at the LCD screen. Look at the screen under bright light. It’s possible that the image is still on the screen but it’s very faint.
If there is no image on the laptop LCD screen, test the laptop with an external monitor. Connect an external monitor to the VGA port on your laptop and turn the laptop on. You can toggle video output between the internal LCD screen and external monitor by pressing Fn and F4 keys simultaneously on HP laptops, Fn and F5 keys on Toshiba laptops, Fn and F7 keys on IBM laptops. Other laptops may use different key combinations.
Let’s say the external monitor works fine but the internal LCD screen has no image at all. If that’s the case, your problem could be related to the LCD screen or the video cable. Also, make sure the video cable makes good connection with the motherboard and the LCD screen. Try reconnecting, reseating the cable.
In my case, both internal and external monitors were absolutely dead. Neither of them had image. That means the problem is not related to the LCD screen or the video cable. From my experience I know that this problem could be related to the laptop memory.
Try reseating the memory module, maybe it’s not making good connection with the memory slot. Try cleaning contacts on the memory module with pen eraser. Try moving the memory module into another slot. Try replacing the memory module with another known good module, it’s possible that your original module is dead.
If you have two memory modules installed you can try removing them one by one, it’s possible that one of the modules is bad. Try installing different memory modules into different memory slots.

In my case reseating, swapping the memory module didn’t help. I was pretty confident that my problem is not memory related and I moved on.
Try removing battery, hard drive and DVD drive and turning on the laptop without these components.
Also, try turning on the laptop with an external monitor when the video cable is unplugged from the motherboard. If the laptop start with video on the external monitor, apparently there is something wrong with the laptop display panel.
Finally, disassemble the laptop and removed the motherboard.
1. Motherboard. Like on most laptops, in my case the video card is integrated into the motherboard
2. CPU with heatsink and cooling fan.
3. Known good memory module.
4. The power button board witch you need to turn on the system.
5. Working DC power adapter.

Still cannot get any video on the external monitor. The system turns on, the cooling fan starts spinning but there is no video.
At this point I’m 95% sure that the motherboard is dead. CPU failures are not very common, so it must be bad motherboard.

Oct 16, 2009 | Acer Aspire 5735 Notebook

3 Answers

When I close the laptop and reopen it, there is just a black screen and I can't get it to work. So I end up having to turn off the computer. Also when I go to the shut down from the start menu, the standby...


You probably have a sticking hibernate, or sleep button. Near the hinge, there is a tiny pin looking thing sticking up. When you shut the computer, this presses against a switch below the case and puts the computer into sleep or hibernate mode. If this sticks, it won't boot up right. Shut the computer down and use canned air to blow out at the pin opening to clear any debris.

Sep 30, 2009 | Dell Inspiron 1300 Notebook

2 Answers

How to undo the sleep mode


actually in these case laptop does'nt display due to many causes some might be in vga chips, inverter, and LCD etc. but in these side first check if light indicators normal all. then check the inverter.

Jun 10, 2009 | Fujitsu LifeBook A1110 Notebook

1 Answer

Pavilion Dv1000 monitor won't show anything


Power management lets you reduce your Notebook power consumption. Your Notebook has two power management modes:
  • Hibernation is an energy-saving feature and safeguard that saves information to the hard drive, then turns off your Notebook. When you resume from Hibernation, your information returns to the screen where you were previously working. Your Notebook hibernates when the Power button is pressed, when the battery has little power left, or when your Notebook (operating on battery power) is in Sleep mode for more than one hour.
  • Sleep, also called Standby, is an energy-saving feature that reduces power to system components that are not being used. When Sleep is initiated, your information is saved in Random Access Memory (RAM), and the screen is cleared. Your Notebook is still on, but the display is blank. When you resume from Suspend, your information returns to the screen where you were previously working.
Automatically put your notebook into hibernation Windows can automatically put your computer into Hibernate mode after a specified period of inactivity. Or Windows can detect when your batteries are running low, and then automatically put your computer in Hibernate mode to save your work before the battery fails. NOTE: Using Power Options in Control Panel, you can adjust any power management option that your notebook's unique hardware configuration supports. Because these options may vary widely from computer to computer, the options described may differ from what you see. Power Options automatically detects what is available on your computer and shows you only the options that you can control. To automatically put your computer into hibernation:
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  2. Click the Hibernate tab, select the Enable hibernate support check box, and then click Apply . Figure 1: Enable hibernation check box c00035872.gif
  3. Click the Power Schemes tab, and then select a time period in System hibernates. Your computer hibernates after it has been idle for the specified amount of time.
Manually put your notebook into hibernation This feature is available only on notebooks with the Windows XP operating system installed.
  1. In Category view, click Start , click Control Panel , click Performance and Maintenance , and then click Power Options . In Classic view, click Start , click Control Panel , and then click the Power Options icon.
  2. Click the Hibernate tab, and then select the Enable hibernate support check box. NOTE: If the Hibernate tab is not available, your computer does not support this feature.
  3. Click OK to close the Power Options dialog box.
  4. Click Start , and then click Turn Off Computer . In the Turn off computer dialog box, hold down the Shift key. The Stand By button will change to Hibernate. Click Hibernate .

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1 Answer

Monitor and LCD detection problem on HP DV6000


I HAD SIMLAR PROBLEM WITH ANOTHER MODEL TURNED OUT TO BE THE LID SWITCH WAS STICKING HOPE THIS WILL HELP

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1 Answer

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You are going to need your WINDOWS CD: http://www.updatexp.com/scannow-sfc.html

Dec 03, 2007 | Toshiba Satellite M45-S265 Notebook

1 Answer

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This is a common problem with HP Pavilion laptops, including mine. Check and make sure there are no non-OS programs running that are trying to control power settings (like a power monitor program running in the system/task tray) and then turning of hibernation in the POWER SETTINGS and then for all "WHEN I CLOSE LID" and "WHEN I PUSH THE SLEEP BUTTON" and "WHEN I PUSH THE POWER BUTTON" select DO NOTHING, then APPLY. Then SAVE SCHEME AS and choose any new name. This will disable all sleep modes forever, but at least you can get on with normal use.

If you are geeky, try going into the BIOS and DISABLING anything marked WAKE ON, and disabling anything having to do with automatic power features, and then try hibernating and so forth normally through the OS again. Sometimes this works if there are conflicting settings in the BIOS also trying to increase power efficiency.

Good luck...

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3 Answers

Faulty backlight hp laptop


Well, first off, do you get a screen (external or onboard) if you boot into the bios? If you have no video whatsoever, the only thing that would start working again after time off, then stop, would be the video module went. slowly, but it went.

Main cause is overheating, caused by the heatsink/fan becoming clogged up.

What makes you think the backlight was the problem BTW? Sure it wasn't just the inverter?

Let me know if you can access bios?

Good luck 

Oct 20, 2007 | HP Pavilion dv1000 Notebook

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