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

["Andy" <andy@xxxxxxxxx>]

"John Williamson" <johnwilliamson@xxxxxxxxxxxxxx> wrote in message 
news:fia8c9$3s6$1@xxxxxxxxxxxxxxxxxxxxxxx
> 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.

I have the screen in bits now in front of me on my lap!! - I am going to try 
unplugging and plugging back in a few cables at the back of the panel. There 
is a lot of references to High Voltages!

Andy.