Re: Toshiba Tecra 8100 Laptop - LCD Screen or Inverter Fault?

[John Williamson <johnwilliamson@xxxxxxxxxxxxxx>]

Andy wrote:


> I think you are right I don't think its just the cable. Funny if its the LCD 
> panel with a solid line like that because I would expect  faults on an LCD 
> panel to have just loads of pixels gone or totally blank screen all together 
> rather than a solid vertical line like that.

As I understand it, the signal goes from the display card through a 
multiplexed parallel bus cable ( 16 bit wide from the look of the one on 
a Portege of the same age) to the LCD unit, where the individual pixels 
are addessed by row & column by the internal display drive circuitry, 
more or less as a mapped memory space. A stuck drive transistor or three 
on the column addressing would give exactly these symptoms, as would a 
problem with the connection internal to the display unit between the 
actual LCD & it's support circuitry.

Just a thought. It doesn't help with the cost of a new panel, I know....

--
Tciao for Now!

John.