Question about Dell Inspiron 1501 Notebook

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Monitor screen is extremely dark

The monitor screen is extremely dark to almost the point of unable to see any images....

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It sounds like the backlight has gone out. You will need to replace the screen.

Posted on Jul 03, 2008

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Screen stays dark


On ALL Panasonic Toughbook Models,
if the screen stays dark I would shut-off the
Toughbook and connect an external monitor
to the VGA port (15-pin female connector),
which is usually BLUE in color.

Make sure the monitor is ON first, then
turn ON the Toughbook.

If the monitor comes on then your problem
is the backlight or possibly the inverter of the
screen.

If no image is shown on the external monitor
and the screen stays dark and you cannot
hear any startup (ie. Windows) sound, then
your video card may be defective. Very few
Toughbooks fail this way since they are
normally very very relaible but it can happen.

Good Luck
Regards,
Richard - Montreal Based
Panasonic Canada Toughbook Authorized Dealer since 1989

Aug 31, 2013 | Panasonic Toughbook PC Laptops

1 Answer

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

1 Answer

Hi. I have an Inspiron 1300. Suddenly, the screen ...


Hi there,

Black screen is often caused by a defective screen. The easiest way to determine if you have a hardware or software problem is by performing a power drain. Please follow the steps below for additional instructions.

Power Drain:
1. Turn off the computer.

2. Unplug the AC adapter from the power outlet and take out the battery from the system.

3. Now, press the power button for about 15-20 seconds.

4. Put back the battery in and plug the AC adapter.

5. Turn on the system and try observing it.
--> If power drain did not work, you need to consult a repairman to have your screen be checked for possible damage.

Hope it helps.

Thank you for using FixYa.

May 21, 2010 | Dell Inspiron 1300 Notebook

1 Answer

My brightness control does not work just turned on and can not hardly see anything it is up and running what now


Have you tested it with an external monitor?

I would say you either have a damaged inverter board or screen baclight lamp. Usually the inverter board fails in one of the following ways:

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.

Mar 24, 2010 | Dell Inspiron 1545 Notebook

1 Answer

ThinkPad T21 dark monitor. What part to change?


seems like a bad inverter that needs changing

Jul 03, 2009 | PC Laptops

1 Answer

Dark unreadable screen


If you see a dim image or flicking image on the LCD screen it means you have a backlight problem.
Connect an external monitor to the laptop and power it up, if you see a clear image on an external monitor, this means your video card is OK.

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 13, 2009 | HP Pavilion dv6000z Notebook

2 Answers

My Dell Inspiron 6400 is extremely dark. +brightness does nothing


Hi there.
Yes, if you can see a very faint image on the screen that indicates that the inverter or inverter coil has become defective and needs looking at or replacing.

Good luck and thanks for using Fixya!!

Feb 19, 2009 | Dell Inspiron 6400 Notebook

1 Answer

Suspend light


Is your laptops motherboard and vga chipset working? Please try to connect the laptop to another monitor if you are unable to get any image out it might be that the 2nd output is disable OR your motherboard or vga chipset has failed.

If the laptop works on another monitor, then there is still something wrong on the lcd.

But I think there is a more serious problem.

if you need more assitance let me know. good luck.

Mar 30, 2008 | IBM ThinkPad T21 Notebook

1 Answer

Dark LCD Monitor


From what I understand there may be a problem with the power circuitry used to light up a small fluorescent light that is the actual light source for the display. The TFT display itself doesn't produce it's own light, and if you point an external light source to the display and see program windows & other things the display itself is fine. Your problem can be solved with relative ease, but only in a computer service because it demands some components to be changed.

Jan 15, 2007 | Sony VAIO GRV550 Notebook

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