Installed a new CCFL tube. Was very careful (so I thought) about R&R'ing the tube. You see the result on power-on.
Could this be a bad cable or connection? Or does it look like a damaged display?
Thanks.-- Al, the usual
Either.
Graham
Simplest way to confirm? Any options other than to scope each line on that
*tiny* flex pc cable?Thanks.
-- Al, the usual
Scoping it won't tell you anything useful. The fact that the lines run the width of the screen tells you that the problem is with the horizontal drivers, which will be on one of the short edges of the panel. Hopefully, you've loosened one of the mylar film cable connectors (very easy to do while working on a panel), & reseating them will fix it.
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
Sadly probable.
Graham
Just a quick question. Did you take anti-static protection measures when working on the laptop ? The simplest way is only to wear cotton ( as I do ) and not have a carpet containing synthetic fibres but adding a grounded ESD mat and wrist strap is the approved way.
Graham
working
have a
strap
Yeah. Assuming that he found all the connectors, zapped driver chips seem to be the likely cause.
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
And there's no telling if they're on the display or the driver chip on the mobo. Could be either end.
Graham
mobo.
No, they'll be the h-driver chips on the LCD panel for sure. The symptoms are classic.
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
screwed.
mobo.
Fair enough. I defer to your experience.
Graham
It amounts to the same thing, & both are equally unfixable.
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
They are routinely repaired by places that refurbish large numbers of cell phones. They replace defective or damaged LCD, and reuse the cable.
-- You can\'t have a sense of humor, if you have no sense!
It's a bit different for a full size screen. ;^)
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
It can be done, with the right equipment.
-- You can\'t have a sense of humor, if you have no sense!
Yes, it can be done (rebonding the cables that go between the driver circuit board within an LCD panel to the actual LCD glass), but it the equipment required is relatively rare and exotic (a laptop with a full size screen is not the same as a cell phone with a few square inches of screen). The number of places that do it is small enough, and the cost is high enough, that as a PRACTICAL matter it is normally not a realistic option.
Michael A. Terrell wrote:
When I talked to a local company I was told they had to purchase used equipment that had been used for laptop sized displays. The techs I know that worked there told ne the same thing. So you are telling me they are all liars?
-- You can\'t have a sense of humor, if you have no sense!
Arguing with Barry is like clapping with one hand...........
You talked to ONE company. And how much do they charge for such a repair? A few years ago new laptop LCD panels were $300 to $450. Now many of them ... full size 15" panels for current model new laptops ... are $60 to $80, brand new. Rebonding of the cables that connect the LCD glass to the driver circuit boards is very rarely done. I didn't say never, but I will say low single digit percentages (of bad panels) ever get this "fix".
Michael A. Terrell wrote:
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