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	Replies: 7 - Pages: 1 - Last Post: 10-May-2012 07:51 Last Post By: xaver

Posts: 4
Registered: 08/05/12

Portege M600 - Backlight switch location
Posted: 08-May-2012 04:42

The display backlight is off and will not turn back on. I can see the laptop when it's directed to a 2nd monitor. I can see very faintly the desktop on the laptop screen- except it is dark. I have tried all the software fixes I can find in this forum but nothing works.

One suggestion I have found that the switch that turns off the display when the lid is closed is stuck in the off position. This makes sense but how do I locate this switch.

Is it incorporated in the display panel hinge?

xaver

Posts: 2,099
Registered: 10/02/05

Re: Portege M600 - Backlight switch location
Posted: 08-May-2012 06:57

in response to: Yo

I can see very faintly the desktop on the laptop screen...

Have you noticed this from the moment when you switch the notebook ON (Toshiba welcome screen and BIOS settings)?
I cannot say for sure but I’m afraid described problem has nothing to do with software but with FL inverter. Maybe is FL inverter defective and must be exchanged.

MasterG

Posts: 2,685
Registered: 21/09/09

Re: Portege M600 - Backlight switch location
Posted: 08-May-2012 10:41

in response to: Yo

I can see the laptop when it's directed to a 2nd monitor.

This means that this is not software issue.
Foggy and faintly display means mostly an problem with the FL inverter…
I think it a job for an Toshiba ASP who would need to check this firstly before replacing the part.

Posts: 4
Registered: 08/05/12

Re: Portege M600 - Backlight switch location
Posted: 08-May-2012 21:53

in response to: xaver

Thank you xaver. What is the FL inverter?

MisterX

Posts: 2,597
Registered: 21/09/09

Re: Portege M600 - Backlight switch location
Posted: 09-May-2012 09:15

in response to: Yo

Fl inverter is a small part which controls the display backlight… if its faulty the display will appear dark.

Posts: 4
Registered: 08/05/12

Re: Portege M600 - Backlight switch location
Posted: 09-May-2012 21:54

in response to: MisterX

Thanks everyone. I'll get that fixed and post the results.

Posts: 4
Registered: 08/05/12

Re: Portege M600 - Backlight switch location
Posted: 10-May-2012 05:29

in response to: Yo

I replaced the FL inverter using one from a similar laptop that had died. All is well now. Thanks again

xaver

Posts: 2,099
Registered: 10/02/05

Re: Portege M600 - Backlight switch location
Posted: 10-May-2012 07:51

in response to: Yo

Good news!

Pages: 1

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