|
|
"Andy" <andy@xxxxxxxxx> wrote in message
news:fiabd0$6js$1@xxxxxxxxxxxxxxxxxx
>
> "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.
>
>
>
right, had the laptop screen in bits and pressed (gingerly without wishing
to it!) the LCD screen right at the top of where the line was and it
magically disappeared. As I took my finger away the line came back -
strange!
I have managed as a temporary job to place a small piece of thin plastic
between the bezel and the LCD screen to apply a tiny bit of pressure and the
line has now gone, for how long it will last like that I don't know. But I
am still going to look out for a cheap screen just in case it goes all
together.
Thank you to everyone for your advice.
I came across this program that claims to get rid of stuck pixels (not dead
pixels) on a LCD screen and reduce screen burn-in on my investigations as
well if anyone's interested and its free to download:
http://www.jscreenfix.com/
Andy,.
|
|