Toshiba Satellite A135-S4407 Notebook Logo
Posted on May 03, 2009
Answered by a Fixya Expert

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Blank Display, using exernal monitor, can see display info w/flashlight, display flashes light at startup

My Toshiba Laptop, Satellite A135-S4407, has been showing a blank display for several months. I use it hooked up to an external monitor, everything works normally with that. You can see all the normal display activity on the blank laptop display if you put a flashlight up against the glass. When the problem first happened the laptop display would work normally for a minute or two, then go blank. Now, when I boot up the computer there is a brief flash of full display light on the laptop screen, often orange in color, then it goes blank. This laptop is 2 years old, the problem has been in effect for less than 6 months. Warranty expired after 1 year.

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  • billq May 04, 2009

    Yes, the external monitor works fine and the laptop works fine. All the windows functions are present on the laptop display when you shine a flashlight onto it. It appears to be the CCFL lamp, maybe the inverter. Each time I "awaken" the laptop after it has dozed off in low energy mode the laptop display flashes orange for 1 or 2 seconds and shows the complete display normally while it does this. Then it goes dark. If the inverter was bad would it do that? Seems like it might be the lamp.

  • billq May 04, 2009

    Thank you for the help. I have read over how to order and replace the back light. This will take time and will require a series of careful steps to complete. They do fix if for you, $75 plus shipping and insurance, so that could be an option.

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  • Toshiba Master 32,281 Answers
  • Posted on May 03, 2009
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You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the 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.
  • 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 it up, 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.

  • Anonymous May 04, 2009

    You can check out the link I gave you (lcdparts), you can purchase the parts and repair it yourself or get them to do it for you.

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Related Questions:

2helpful
2answers

No screen display
Your LCD inverter circuit or Backlight lamp may have died. The Backlight lamp is a CCl (Cold Cathode Lamp) closely resembling a thin fluorescent light bulb.
If you can replace this lamp, the typical cost for this component is $9-$15.

First thing to try is to plug in a standard (RGB analog) monitor into the system's 15-pin external monitor port to see if the system is booting to MSWindows (or not).
If the OS is failing to boot, at least the external monitor may allow you see what the ROM BIOS is doing, and possibly run BIOS-based system diagnostic software.
If the OS is booting properly, you can use the notebook PC with the external monitor (as a workaround), until you can repair the console screen, or replace the computer entirely.
If you are able to access the system via the external monitor, you may want to take the opportunity to backup any important data (iTune downloads/income tax forms/original manuscripts for novellas/MRI scans,etc.) on the Toshiba A135 to an external hard drive, large flash drive or CD-RW discs.

Here's a good laptop lamp/inverter solution posted to FixYa:
http://www.fixya.com/support/t2358968-laptop_screen
Read full answer
Dec 14, 2011 • Toshiba Satellite A135-S4407 Notebook
0helpful
1answer

Blank screen
If you have access to an external monitor, try connecting it to the laptop. If you have video, then press and hold the Fn key and tap the F7 key. This toggles the video from LCD only to external monitor only to both in three taps. If you still have no video on the LCD but you do on the monitor, shine a bright light on the LCD display. you may see the video displayed. If so, then you have either a bad back-light or a bad LCD inverter in the laptop display. I would suggest replacing both to be on the safe side. A bad LCD can damage the inverter and a bad inverter can damage the LCD.
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Mar 30, 2011 • Toshiba Satellite A135-S2276 Notebook
0helpful
1answer

I have a Toshiba A135-S4407. No power
The problem might be from your Processor or probably change the memory module once the problem persist then your processor is the problem and later restart your system ok
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Feb 20, 2010 • Toshiba Satellite A135-S4407 Notebook
0helpful
1answer

Toshiba Satellite A135-S2276 PC Display screen
Maybe it is just disabled they can be set to... Screen on Laptop ONLY... External Screen ONLY, Both Screens on together. Try to find the keys that toggle those modes? in your manual.
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Feb 03, 2010 • Toshiba Satellite A135-S2276 Notebook
0helpful
1answer

I have a toshiba Satellite a135-s2386. It powers on but nothing on the display. I think I need a new motherboard. But am not for sure. What is the part number for this motherboard. any help will be...
Does the laptop appear to boot up but the screen id blank?
Does the hard disk LED light flash?
If so you may have a faulty inverter or defective CCFL lamp. A faulty CCFL lamp may have the following symptom: Screen flashes on and off or displays reddish pink hue. Picture stays on in red and slowly be come normal. Picture flickering and/or with dim display or appear black. Picture flickers 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 replace the CCFL lamp.
To determine if the video card or the LCD is faulty, 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 or a faulty inverter that supplies high voltage to the CCFL lamp. Usually the CCFL lamp fails before the inverter.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site: -
www.ladparts.net
Read full answer
Dec 09, 2009 • Toshiba Satellite A135-S2386 Notebook
0helpful
1answer

I can't turn on my laptop
Try charging it for an hour or so. And then try, else reboot it.
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Sep 30, 2009 • Toshiba Satellite A135-S4407 Notebook
1helpful
1answer

No response from Toshiba Satellite A135-S4407
Yes, there is a very good chance your motherboard is bad. If you haven't already, please remove one of your two memory chips from the memory bank ( bottom of the laptop ), and try powering up again. Sometimes a bad or loose memory chip can cause a no post issue. If you're still having the same problem, then the only other piece of hardware in your laptop aside from the motherboard that can cause "no video" would be the cpu. Requires a complete tear down of laptop and a known good cpu to test. However, from my personal experiences the A100 series motherboards are notorious for having motherboard problems so it's most likely the motherboard. I can repair your laptop at a great price. Email for info : [email protected]
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Mar 07, 2009 • Toshiba Satellite A135-S4407 Notebook
0helpful
1answer

Satellite 1115 blank screen at start up.
Try using an external monitor. If an external monitor works then the issue may be backlight if not then the issue is the LCD screen. the way to test that is after you have used an external monitor to verufy booting and the the system works. then if the machine is out of warranty you remove the bezel anf the screws holding the lcd in place. lean the lcd forward. with a flash light on turn your system on and flash the light through the display if you see your post and or windows with the flashlight then the baclight is bad. if not lcd is bad. If you can not get teh external monitor to work, then your motherboard is bad or graphics card.
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Dec 02, 2008 • Toshiba Satellite A100-S8111TD Notebook
3helpful
2answers

Toshibba laptop a135-s2276 ,my mother bords smd chip does not work so display of screen does not appear
The problem is well known witht this model Toshiba - the problem is the fan stops working and then hence shuts down to prevent overheating - it does not take long once the laptop is hot. Without replacing the fan just reboot the laptop until you hear the fan start again on reboot.
Read full answer
Oct 15, 2008 • Intel Motherboard
0helpful
1answer

Satellite a135-s2266
check for the lights on the front panel. make sure that the battery and ac light is lit on. check for any light activity on the HDD light indicator. if it's a black screen, try to use a flashlight and check if there's a faint image. if there is none, there is a problem with the video card or the system board on your computer. if you have an external monitor please try to connect it to your laptop so that we could isolate if there's something wrong with the video card. to toggle the display kindly press Fn and F5.

i hope this info helps.
Read full answer
Sep 08, 2008 • Toshiba Satellite A135-S2266 Notebook
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