[Gllug] Precision M65 screen - horizontal lines ... ut oh :|
lesleyb at herlug.org.uk
Thu May 26 23:47:51 UTC 2011
On Thu, May 26, 2011 at 08:40:34PM +0100, Alistair Mann wrote:
> 'lesleyb' wrote:
>> Hi everyone,
>> I have a Dell Precision M65 with horizontal lines appearing on the
>> left of the screen. They extend from the screen edge to 1 Gkrellm
>> width where GKrellm width=110. They extend the full height of the
>> screen with some flicker on the lines.
>> These lines appear at switch on so I suspect this is not a driver
> Correct. The internal screen is faulty.
>> I have tested by attaching the laptop to an external LCD screen and
>> the lines do not appear on that external screen.
>> http://www.lcds4less.co.uk/do-i-need-a-laptop-screen.shtml throws me
>> a little.
>> "The degree of resolution (horizontal and vertical lines) of a
>> halftone image based on the number of lines-per-inch (lpi) or lines
>> per centimeter, used to create the halftone. The line screen or
>> sometimes called screen frequency at which an image is to be display.
>> A screen defect whereby a LCD screen exhibits vertical or horizontal
>> lines and is not due to a defect of the notebook itself.
>> Solutions: Connect your laptop to an external monitor. If the image
>> appear on the external monitor, it's indicate a faulty LCD screen."
>> I would have thought the lack of any horizontal lines on the external
>> monitor indicates it is the laptop screen and not the on-board
>> grpahics chip, an nVidia G72GL Quadro FX 350M, that has the problem.
> You are correct, and that website has remarkably bad English, it's hard
> to tell what they were intending to say.
>> The above quote and this post
>> seem to both indicate the lack of the problem on the external monitor
>> indicates the graphics chip is at fault.
> The Dell website you reference does not have the same problem as you, so
> don't apply what it says there to what you're experiencing.
>> I am confused -- can anyone shed light on this ?
> As I understand it, the lines issue is related to faulty components
> around the edge of the display itself. Solution: change the display (I'm
> not brave enough to break out the soldering iron if compressing and
> flexing those display edges is not enough!)
First of all thanks everyone for your replies.
You have all been very helpful. :)
The horizontal lines are still there, naturally they don't show up on
a screen grab so I can't show what the visual effect.
I bought the laptop some 5.5 years ago but the motherboard was replaced
about 2.5 years to cure a faulty RJ45. About six weeks before the extended
warranty ran out. :)
The only thing retained from the original board was the RAM which I later
I ran the F12 Diagnostic test and there were no problems reported with
the Video Card, RAM or LCD Inverter. I
The fault shows from power up onwards and doesn't alter between POST and
the OS loading so I know that isolates it from any OS dependency..
I'll try a chat with the Park Royal chaps over the phone to get estimates.
Thanks once again for all your help :)
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