Question about Sony VAIO PCG-K33P Notebook

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Screen goes dark

My laptop powers up but then the screen gradually goes dark.

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It could be the display power inverter or the illuminator is going out. generally the inverter goes first.

Posted on Apr 29, 2010

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1 Answer

Dell Inspiron 1525 laptop screen goes dark


Hey Lea,
Try the steps below to see if they will resolve this issue that you are having with your computer. If this does resolve the issue you can email me. My email address is listed below in my sigfile.

1) UNPLUG THE LAPTOP
2) REMOVE THE BATTERY
3) HOLD DOWN THE POWER BUTTON FOR ABOUT 30 SECONDS TO 2 MINUTES
4) THEN PUT THE BATTERY BACK IN
5) START IT UP..

Thank You,
Dell-Jesse L
Dell Social Media and Communities
email jesse_leonard@dell.com

Apr 13, 2013 | Dell Inspiron 1525 Laptop

2 Answers

Laptop toshiba satellite p200 bw5 screen goes dark as if darkness/brightness was adjusted - but not Thanks


An LCD screen cannot produce enough light by itself. It needs a Backlight to help illuminate the screen.

Power for the Backlight is produced by an Inverter. An Inverter also provides power for the LCD screen.
It reduces voltage for the Backlight, and increases Voltage for the LCD screen, from the laptop's power.

Most of the time a dark LCD screen can be attributed directly to a bad Inverter. (Around 90 percent)

A Backlight is a CCFL.
Cold Cathode Fluorescent Light.
VERY similar to the fluorescent lights you see used in residential, and commercial applications.
(Homes, and businesses)
Only on a MUCH smaller scale in physical size, and needed power to operate.
When a Backlight goes bad, it just goes all at once. Not goes dark as you have stated.

(Your statement meant to me that you power on the laptop, the LCD screen shows well, then goes dark)

How to install an Inverter in a Toshiba Satellite P200 series laptop,

http://www.irisvista.com/tech/laptops/toshiba-satellite-p205/take-apart-display-panel-1.htm

(You can click on each individual photo to enlarge. You are on Page 1. Page 2 is accessed at the bottom, by clicking on it. Page 1::Page 2::Find another model)

Just one of many places that offers an Inverter for your Satellite P200.

http://www.notebooksolutions.ca/zc/index.php?main_page=product_info&products_id=5367&zenid=43bc1e775a9ed2d4309140111231cab5

NOTE*
1) ALL power removed from the laptop before beginning.
AC adapter (Charger), and Battery.

2) The screws you will remove, may have screws that look alike, but are NOT.
Do Not mix them up.
For this reason it is suggested to use a multi-compartment container, and label the compartments for where the screws came out of.
You can use a clean egg container, and label the individual egg holders, in a pinch.

IMHO it isn't hard to perform this repair, and you can do it. Save yourself money.

For additional questions regarding this, or comments, please post in a Comment.

Regards,
joecoolvette

Oct 22, 2010 | Computers & Internet

1 Answer

Dell ADAMO 13 w/Vista 64 Random power failure...goes dead in 1 second. Battery fully charged. Happened with external power and when on battery. I have latest BIOS v6.0. I ran pre-boot diagnostics...


If the power totally fails (i.e. power is cut off, LEDs turn off, fans stop, ... etc), then this more likely to be because of a short circuit developing in a failing semiconductor component, or a power supply problem.
However, if the laptop is still running & only the display on its LCD is cut off but the laptop itself stays powered on, then your laptop might be experiencing a failing screen inverter board, a failing screen backlight lamp, or a failing LCD screen cable.

TYPICAL INVERTER FAILURE SYMPTOMS

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

Feb 07, 2010 | Office Equipment & Supplies

2 Answers

Charger makes my screen dark


GO into the control panel and check your power settings. You might have it set to use less power when plugged in.

Oct 03, 2009 | Compaq Presario Notebook

1 Answer

Toashiba 1005-S157 won't turn on.


remove the batteries for 2-3minuty, check if it works,
Enter the BIOS, set the boot order of devices on the 1-HDD, 2-CDROM

Sep 09, 2009 | Toshiba Satellite 1005-S157 Notebook

1 Answer

Dark shadow on left side of laptop screen


THE SCALAR OF YOUR LCD ARE LEAK IT'S RECOMEND TO REPLACE A NEW ONE LCD

Aug 18, 2009 | Computers & Internet

1 Answer

Screen is dark


Hi Yacob

First Run a diags on the dell laptop. You can initiate it by pressing fn+power button together and start the laptop. It will go to the diags screen. Tell me if the diags pass or not and then we will troubleshoot further.
Thank you
Rakesh
Dell Laptop Expert

Jan 06, 2009 | Dell Inspiron 1501 Notebook

1 Answer

HP Pavilion, Screen working, but extremely dark!


Hi,
As per your description, I find that the issue is with the LCD Backlight which is also called as LCD Inverter which lights up the LCD to show us the Display on the LCD Display.
If this Backlight is gone bad, you will be barely able to see the Display on the LCD.
Coming to the Noise you had mentioned above can be from the Cooling fans of the Notebook which will be spinning at high speed when the Notebook starts and will reduce gradually after few minutes.
I recommend you to try cleaning the Cooling fan vents using any Vacuum Cleaner or Air Blower.
I recommend you to contact any nearest HP Authorized Service Center and get the LCD Backlight replaced.
Hope this helps....

Jul 21, 2008 | HP Pavilion dv6000z Notebook

1 Answer

Laptop Screen dark yet computer works with external monitor


does the fan work ok? and do you have a laptop holder for it or you just have it on a desk ....get a laptop holder for it if you do not have one and as for the rest goto the power mangment area on the computer and see if the monitor might be on stand by after a few min ...

Jul 14, 2008 | Compaq Presario R3000 Notebook

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