Re: z935 p300 Toshiba Portege Backlight fuse



For anyone interested - this is what I suspect was the cause of the backlight failure on my Toshiba Satelite z930. The component in the bottom right hand of the attached picture measured hard open circuit. I was told by someone else that the power supply for the LED backlight driver chip (located in the LCD panel) goes into the LVDS connector on pin 1, so makes sense).

Unfortunately for me, I put the board back together and it is dead.
I get a power LED but no boot up sequence happens and it shuts...

Re: z935 p300 Toshiba Portege Backlight fuse




Update...
Still no luck with identifying the fuse for backlight power on my Toshiba Satellite Z930 motherboard.

I've completely removed the motherboard and taken some decent close up pics and marked them up with what I have determined so far. There are 2 fuses marked 'N' and 'R' on the same side of the motherboard as the LVDS connector but neither of them has anything to do with the LCD. The "N" one is for the mains AC charger and 'R' one is for battery power.

I have...

Re: z935 p300 Toshiba Portege Backlight fuse



Hi.
The part with a 'N' is a fuse, yes. But it is the fuse of the main power supply from the laptop charger. As far as I can tell, it has nothing to do with the backlight power supply. The voltage at the fuse marked 'N' measures 18VDC with ref to GND.
The image is 100% intact on the LCD but it is only viewable when you shine a torch on the screen (due to no backlight).
I have tried measuring the voltage on the test points on the board for the various lines going to the LVDS connector and through...

Re: z935 p300 Toshiba Portege Backlight fuse

Hi all.
I have a Toshiba Satellite z930. P/N is PT23LA-01100N. I suspect I have a failed backlight fuse on my motherboard.
I have attached a photo of the motherboard and highlighed the component which I think might be the backlight fuse. It measures open circuit with a multimeter. Does anyone have any idea if this is the correct component?

Thanks
James...