Having problems with your Toshiba Satellite M35X-S149 Notebook ?

NO DISPLAY ON TOSHIBA M35X-S149 LAPTOP

\015 I just replaced the system board because of a bad chip, typical on this system board. When I boot the computer (new system board) I have no video display on the laptop. The computer boots up fine, I know this because if I hook-up an external monitor through the laptop jack, I have video (I see the Windows Log-on Screen). The display on the laptop appears to be totally black - no indication of being energized. Although, if I push down on the small button at the top right of the keyboard (contacted when closing laptop), and let it snap up I do get a black-grey very dark lumination but no images or display. This lumination lasts for about 5 seconds, then nothing. Are there settings I am not aware of, could it be a driver problem, any ideas at all. Again, I do have a display on an external monitor. Thanks, Ray\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.
Maybe you forgot to attach the LCD cable? It's under the plastic bezel between the LCD and keyboard, very easy to remove and check.
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