Having problems with your Toshiba Satellite A135-S4407 Notebook ?

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

\015 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.\015\012\015\012When 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. \015\012\015\012This laptop is 2 years old, the problem has been in effect for less than 6 months. Warranty expired after 1 year.\015

Answers :

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:

\015\012
    \015\012
  • Screen flashs on red/pink and off. \015\012
  • Picture stays on in red and slowly be come normal. \015\012
  • Picture flickering with dim display. \015\012
  • 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.
Repair Help & Product Troubleshooting for Toshiba Satellite A135-S4407 Notebook

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