Question about HP Pavilion dv6000z Notebook

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Using a 12 to 110 inverter to power it

Inverter powers battery charging but when turn computer on screen starts flashing, bright dim, and then shuts down 300 watt pure sine wave inverter??

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  • Steve Allison
    Steve Allison May 11, 2010

    What kind of 'pure' invertor is it? These are very rare- probably 98% are 'modified sine wave' since there is a lot of wasted power in a true analog sine wave generator.

    Have you checked the output voltage of the invertor? It may be affecting the ability of the plug-in and internal regulator to keep things within limits.

  • Anonymous Mar 22, 2014

    The dc power supply failed and was fixed with a new supply cord, however it has now failed again, even tho the readings are 13+ volts. The 240 AC works fine and I want to instal a dedicated 240 AC supply

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Check that the power adapter for your laptop supports 110V.
Measure the output power with a multimeter. If its below 110VAC (Alternating Current) your not getting enough power.

Does your computer work when its is not plugged in the Inverter?

Posted on Oct 07, 2008

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I have lenovo g550...my screen flickers in every 5minutes...


Failing Inverter An inverter, typically found inside a laptop computer, consists of a small board, which has impregnated electronic circuits stamped on it. Inverters look like thin boards about the of two sticks of chewing gum. The inverter and its bulb control the intensity of the liquid crystal display, which lights the screen monitor. The computer can control the output voltage of the inverter and either lighten or darken the screen. A special type of inverter can adjust the brightness of the screen by using an internal sensor to judge the room brightness, and then adjust the screen accordingly. Failing inverters give off some specific warning signs, which can be recognized by observing different screen characteristics.

Short Intermittent Display Upon turning on the laptop, the screen flashes on in the normal mode for a short period and then blinks to black. A very faint image appears in a dark background, which will be very hard to see almost invisible. After shutting off the laptop and restarting, the same mode occurs, where the screen appears normal for a few seconds then fades to black. This condition points to a failed inverter. To confirm this, plug in an operational external monitor; if the external monitor functions, the inverter has failed. b> Total Blackout with Ghost image b> The laptop turns on, as indicated by the power supply button, but the screen comes up black. The screen comes up black after restart. You might be able to detect a very dim or ghost-like image on the monitor. When you plug in a known functioning external monitor, the external monitor operates normally. This mode of display indicates a failed inverter. b> Long Term Periodic Operation b> With this failure mode, the laptop screen illuminates normally upon start-up and remains that way after several minutes, hours or even days, until it goes very dark again. Brightness controls or restoration attempts do not work. Most often, the screen will function normally with a computer restart, but will eventually return to black. Faint ghost images might appear, as seen in the total blackout mode. b> Dark With Color Variation b> Upon computer start-up, the monitor shows black or dark gray, accompanied by very faint images. The screen might have an intermittent color change, or remain on with a non-standard color variation, like pink or red. b> Auto Control Switch b> If the screen appears black, with no faint or ghost images, look for the lid switch near the back hinge. The switch, when depressed with a closed lid, shuts off the computer and monitor functions. Sometimes the switch becomes stuck in the closed position, disallowing the computer and monitor to turn on when opened. Pushing the switch manually several times can often free it up. If the switch tab has broken or jammed inside the case, it needs replacing. b> Loose Connection In this mode, the display looks normal upon start-up, but tapping the side case of the computer turns the screen black. More tapping results in the screen functioning normally then cutting out again. This condition points to a loose wire connection from the inverter to the LCD backlight lamp, or the video cable. The connectors can be accessed by removing the monitor bezel screws and pulling the plastic retainer off. Both connectors can be cleaned and refitted.

Feb 10, 2013 | Lenovo G550 PC Notebook

2 Answers

My screen suddenly went black and even after turning it on and off, and removing the battery and holding down the power button the screen will not return to normal..help


Depending on the age of your laptop there is a good chance that your backlight inverter is no longer functioning.

What type of laptop do you have and how many years have you had it?

Depending on the model you might be able to pick up an inverter very cheap.

Mar 01, 2011 | PC Laptops

1 Answer

Power light comes on - numbers lock is lit steady, caps lock and scroll (I think that's what it is) flash. Screen stays black and then the laptop turns off...??


Can be one of three things:

Power not adequate enough for laptop - You can purchase a new power adapter relatively cheap from eBay for around $10.00. It may have been surged and will not allow the battery to charge or allow enough power to start the computer.

Bad battery - Take the battery out of the laptop and try it without. if it works, replace the battery or use without it.

Bad screen (inverter) - The inverter can be damaged. This can be caused by wear and tear, being dropped or other. The inverter is like a lamp that sits behind the screen. Take a flash light and place it directly into the screen to see if there is indeed a picture back there (will be very dim). If so, replace the inverter (difficult) or replace the screen (simple). Easier diagnosis would be to connect another monitor and see if it comes on (instead of the flashlight method).

Sep 25, 2010 | Dell Latitude D630 Notebook

2 Answers

HP DV1000 screen too dim


The 4 most common problems with dim lcd's on a laptop are boken screens, bad power inverter, bad florescent bulbs or a broken cable.

You can test the power inverter with a meter.

There should be 2 bulbs. If your screen is dim and your inverter is good and you can still make out what is on the screen, you probably have a bad bulb. If you can't determine which bulb is bad you'll have to replace both.

In my opinion, the easiest way to handle this is to replace the whole screen. Yes, it's more exspensive, but consider that it is most likely to fix your problem. A replacement screen comes with the power inverter, both bulbs, and the cable; already assembled and ready to install.

Mar 06, 2010 | HP Pavilion dv1000 Notebook

3 Answers

My dell e1404 laptop is having a issue with the screen. When you turn on the computer the screen will come on for about 30 seconds and then go off. When it's on everything looks normal. once it goes out...


The inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. The inverter board converts low voltage DC power (few volts) supplied by the motherboard to high voltage AC power (few hundred volts) needed for the backlight lamp.
When the inverter board works properly, the backlight lamp gets power and the LCD screen lights up. As a result, the image on the screen is bright. If the screen is dimming down, means that the inverter is failing in it;s job to supply the needed voltage to the Backlight.
The Inverter is mounted underneath the display screen and is connected by a two wire plug.

Nov 07, 2009 | Dell Inspiron E1405 Notebook

1 Answer

Monitor is dim


Sounds like your inverter is failing. The inverter takes the dc power from the battery and charger and converts to high voltage AC current for the backlight lamp inside the screen. When the inverter starts to fail, the display will sometimes blink, dim out over time, flash just get dark and stay that way.

Sep 28, 2009 | Toshiba Satellite A215-S7422 Notebook

2 Answers

Acer Aspire 5735 LCD changes bight-dim-bright, etc.


You could have a faulty inverter, To determine if you have a LCD screen, inverter or video card problem, read this and follow these instructions.
Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
for parts, repair service and DIY info.

Jun 24, 2009 | Acer Aspire 5735 Notebook

1 Answer

Dell latitude D600 display blacks out, showing just a ghost image


Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is the backlight.

If you see a very dim image or flicking image on the LCD screen it means you have a backlight problem.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

Mar 21, 2009 | Dell Latitude D600 Notebook

1 Answer

Hp laptop 9720us screen wont brighten or dim. last week my screen went blank brought it to a shop they changed the inverter and also some cable connection . works fine just not quite as bright as before ....


You got the wrong inverter fitted - i'm sure your unit requires a sinle lamp inverter and they have cheated - putting in a generic lamp inverter and branching togeather the wires to accomodate the single plug thus reducing the available volatage for the lamps - this is why it's dim - correct part is 431391-001 Display panel power inverter - For use with single lamp display panel

Mar 10, 2009 | HP Pavilion DV9720US Notebook

3 Answers

When my computer boots up, my screen is still black!


do check the LCD brightness settings..its usually on the function keys..you press the function key and the other key at the same time there should be a icon on the keys..some laptops have the arrow buttons(up,down or right and left) for controlling brightness...hope it helps!

Oct 30, 2008 | Compaq Presario R3000Z Notebook

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