Question about Dell Vostro 1500 Notebook

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Laptop inverter problem

My display turned dark although i could make out distinct images under torchlight. I replaced the inverter and now its working on ac power .

as soon as i turn to battery power the display again goes blank as it was with the faulty inverter. also the laptop display brightness control function keys don't work and i cant change the screen brightness

please help me i use a dell vostro 1500 laptop
I have the very same issue with my Dell Vostro 1500 and of course it was out of warranty (just ONE year!) 3 months ago. My brightness controls work, but I have the same issue with the screen going dark after about 1-2 minutes. It's VERY frustrating. Not sure if I should work with Dell to repair or take to Geek Squad or something. Any suggestions?

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  • Anonymous Jan 25, 2009

    i have same problem

  • Anonymous Jan 26, 2009

    lol, same problem with my vostro 1500 exactly three months out of warranty...



    Odd thing is, if i close the lid and open again it works for a little while and will run a long time if i dim the screen.



    at full brightness the screen flickers and the screen inverter is buzzing loudly.



    As much as this sounds like a hardware problem I don't understand how there is no flicker in start up or bios...

  • Anonymous Feb 01, 2009

    Quick non fix solution...

    Turned dimmer all the way down and cranked up gamma and brightness on graphics card... gonna go blind from dim screen but it is stable, no longer turns to black and very little flicker...



    Need to fix it but...

    How can i be sure it's bulb vs. inverter?

    inverter makes all the noise and changes pitch when i touch it (press lightly on DELL symbol on bottom of screen)



  • Anonymous Apr 30, 2009

    I have the same problem - with 2 identical Vostro 1500's, just past the 1 year mark!

  • Anonymous Mar 13, 2014

    when power button is turned on there is no display although every thing seems to be working.

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Its funny I don't know if this is related, but I have pretty new Compaq CQ50. The computer was droped and the back panel fell off. Eventually the screen inverter needed to be replaced. I bought a cheap screen inverter from Hong Kong for $5. When I put it in the screen inverter was buzzing enough to be worried. Anyhow the way the inverter is mounted in the CQ50 is its held on with a magnet instead of screws. I became suspicious and I lifted the inverter off the magnet. Basic engineering tells you the mounting magnet was interfering with the coil in the screen inverter. Its almost like electrical/computer engineers at HP/Compaq did this intentionally so no other company could fix the screen inverter. Anyhow i removed the tape from the mounting magnet and took it out and just taped my screen inverter into place. It works perfectly and no buzzing because of no magnetic interference. And I didn't pay alot for another screen inverter. It takes a good GT engineer to see engineering dessign sabotage Ha Ha Ha!! :-) I'm a Helluva an Engineer

Posted on Feb 13, 2011

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NVidia drivers have a problem it seems, not sure if fixed ever or not, but I had this problem and it drove me NUTS. I didn't have this problem for the first year, then I updated to NEW DRIVERS and all hell broke loose. The PROBLEM is (in my case anyway) that sometimes the system thinks the MAIN monitor is OFF and it PRESUMES the EXTERNAL monitor is in use. For awhile I hooked up an external monitor every time it came up blank, then reset my video settings and it would just work. Then I realized that by using the Fn-Switch Video key combination (to switch which monitors were being used) that I could do it BLINDLY sometimes, however... if you closed your lid while running, Windows Media Player, and power off or screen saver kicked in anywhere along the way, it would HANG until I FIRST killed Media Player.. then it would let me reset video settings. Eventually I just went through NVidia drivers backwards until the problem went away.. SEEMS to have gone away anyway. Good luck :) m.i.k.o.l.a.v.i.s.i.o.n

Posted on Mar 02, 2009

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Sounds like the real problem is with the CCFL lamp to me. :(

Posted on Jan 15, 2009

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The LCD screen displays is dark/ dim (faint display that can be seen in sunlight or torchlight) because there is no backlight.
There are two parts responsible for lighting the display. First is the CCFL (Cold Cathode Florecent Lamp), which is the back light and the second is the Inverter board, which provides high voltage to the CCFL. Either of the parts can be faulty or in some rare cases both. But most likely it is the CCFL (Lamp). Its life is limited and depending upon how long it has been in use, you can have a better idea - if its the CCFL or Inverter.
(You can check it by connecting you PC with some external display, which would work fine). (Hence, the board/ graphics processor is OK. In case the graphics processor fails, there is no display at all on the external monitor).
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So, my advice is that you check the LCD display for replacement of CCFL. I have found a general link about CCFL replacement. Click here for detailed and graphical DIY instructions about LCD disassembly.
Make sure you take proper precaution while working inside LCD, as the inverter generates a very high voltage.
IF YOU ARE NOT EXPERIENCED WITH WORKING INSIDE SUCH ELECTRONIC COMPONENTS, I SUGGEST THAT YOU SEEK PROFESSIONAL ASSISTANCE FROM AUTHORISED SERVICE/ REPAIR CENTER FOR REPLACEMENT OF CCFL OR INVERTER.

Hope it helps! Good Luck!
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Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
If it works on an external monitor most likely the LCD is faulty and needs replacement. If it's still under warranty, take it for a replacement. If not, you can do it yourself, it's pretty easy. Remove the rubber covers on the side of the screen, unscrew the screws take the plastic cover off, disconnect the video inverter and put in the new LCD after you connect the video inverter to it.

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Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
If it works on an external monitor most likely the LCD is faulty and needs replacement. If it's still under warranty, take it for a replacement. If not, you can do it yourself, it's pretty easy. Remove the rubber covers on the side of the screen, unscrew the screws take the plastic cover off, disconnect the video inverter and put in the new LCD after you connect the video inverter to it.

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Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If no luck, try to remove battery and drain the power, then replace battery and turn on.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
If it works on an external monitor most likely the LCD is faulty and needs replacement. If it's still under warranty, take it for a replacement. If not, you can do it yourself, it's pretty easy. Remove the rubber covers on the side of the screen, unscrew the screws take the plastic cover off, disconnect the video inverter and put in the new LCD after you connect the video inverter to it.

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If the laptop acts as it would start and there's just no image, look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
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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.

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Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
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