Re: TiBook display replacement (was: TiBook display crisis)

[gianfranco sciacca]

[EMAIL PROTECTED] (gianfranco sciacca) asked:
My question to the list is: are displays and inverter boards / cables
the same across the entire DVI range (667 MHz to 1GHz), or the 1GHz
shares parts only with the 867 MHz?
Hardware is the same across the DVI line, with the only difference (of
which I'm aware) the typeface on the screen bezel changed between the 
two
series. Data cables can be interchanged between any TiBooks, and
inverters are interchangable across the DVI lines.
ok, this was confirmed by the contact at pbparts suggested by Laurent 
and Bob. I hope to be able to pick up soon a DVI TiBook for parts and 
carry out the repair (Dan pages are an excellent help).

I only have one additional doubt and a visit to local Apple centers did 
not help, as I got two different opinions. I turn the question to the 
list, hoping to clear the fog. I have said before that the screen light 
flashes briefly (not a full luminosity and with a gradient to zero 
towards the left of the screen) at startup, after waking from sleep and 
when detecting displays. Disconnecting the backlight cable, the 
flashing does not occur. I think this means (I guess) that the 
backlight bulb is still alive? If yes, does this rule out a display 
swap (thus leaving only the inverter as possible culprit - a 
straightforward and inexpensive repair), or there could be some other 
damage inside the display assembly. I know this is a quite specialised 
question, as a matter of fact these apple technicians I consulted had 
opposite opinions. Maybe some tech on the list could have a third 
opinion...

Quite frankly, having examined the construction of the display 
assembly, I do not see where some liquid could penetrate inside (even 
though it *was* dripping on the screen) in order to damage it. The only 
place that seems conceivable to me, is the right speaker /secondary fan 
area, which is just next to the inverter connector to the logic board 
(although this is located at the back of the board).

Thanks again for all the help, I hope to revive the beast in the near 
future.

cheers, gianfranco
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Re: TiBook display crisis

[crap mail]

could be the ribbon video cable or inverter, i've seen some examples of 
the cable especially with abused clutches in tis. got applecare?

rama.
On Sep 27, 2004, at 10:20 AM, Dan Palka wrote:
On Sep 27, 2004, at 11:55 AM, gianfranco sciacca wrote:
The product I have used for cleaning is a spray suitable for TFT 
display, but I was told it is fine also for notebooks (there's also a 
notebook picture on the bottle).
The LCD on your PowerBook IS a TFT.  TFT is a type of LCD technology.  
TFT = LCD (although its not always the other way around).

That being said, I think you should contact the company.
 What have I done there? Perhaps some drops have penetrated somehow 
in the machine?
Perhaps too much?  Were there instructions on the bottle?
NEVER SPRAY THE MACHINE! Always lightly spray the cloth, THEN wipe 
the machine.  I've been cleaning PowerBook displays with Windex since 
my mom had a brand new just released PowerBook 165c in this manner, 
and have never had a problem ever.  Eleven PowerBooks and PC notebooks 
later, I've still yet to run into trouble with my Windex solution.

Or have I damaged the LCD for good? Any hope to recover this beast, 
or idea of what to look at? I never had any display issues in the 
past on this machine.
Do this:  Remove power adapter and batteries and everything.  Let the 
machine sit for a day or two, preferably on its side (open it to form 
an "L" shape so that it can balance itself).  Hopefully it will dry 
away leaving the electronics unfried.

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Re: TiBook display replacement (was: TiBook display crisis)

[Dan K]

[EMAIL PROTECTED] (gianfranco sciacca) asked:
>My question to the list is: are displays and inverter boards / cables 
>the same across the entire DVI range (667 MHz to 1GHz), or the 1GHz 
>shares parts only with the 867 MHz?
Hardware is the same across the DVI line, with the only difference (of 
which I'm aware) the typeface on the screen bezel changed between the two 
series. Data cables can be interchanged between any TiBooks, and 
inverters are interchangable across the DVI lines. The backlight cable is 
integral with the LCD, soldered directly to the CCFL tube inside the LCD. 
The CCFL is replaceable, but the job ain't for the faint-of-heart.

Also, _any_ TiBook display assembly _can_ be used on any TiBook. Early 
screens of course only show the lower rez on any 'Book. Likewise later 
DVI screens display only the lower rez on pre-DVI 'Books, with garbage 
filling the right hand and bottom edge excess pixels.

see my page:


hth,

dan k

.
http://macdan.n3.net/
carracho://dankephoto.dhs.org:9700
hotline://dankephoto.dhs.org:9500
.


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Re: TiBook display replacement (was: TiBook display crisis)

[Bob]

The National Enquirer reports at 2:10 PM -0400 10/1/04, Laurent 
Daudelin wrote:

> I would suggest you send an email to John
>Meismer at PowerBook Parts  and ask him. I dealt
>with him in the past and he has always been friendly and professional
>whenever I had a hardware question. I've always been very satisfied with his
>services and highly recommend him.

Just for another data point to support Laurent's advice. I also 
highly recommend PBparts. They have been in business for a number of 
years and have developed a stellar reputation within the Mac 
community. They have quality parts and are trustworthy.

My only complaint is that in some cases their prices have gone up 
quite a bit over the past couple of years or so. But I'm sure that 
John is experiencing the same thing on his prices for the parts.

Good guy, good service, quality products. And IIRC located in Phoenix 
for F.Y.I.

Bob


Bob
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Re: TiBook display replacement (was: TiBook display crisis)

[Laurent Daudelin]

On 01/10/04 14:05, "gianfranco sciacca" <[EMAIL PROTECTED]> wrote:

> Thanks to all who gave suggestions to try and tackle my 15" TiBook
> display problem. Unfortunately the display is still dark with brief
> flashing at startup and the "explosion effect" after shutting it down
> or sleeping it is visible also in daylight.
> 
> A local Apple Centre gave me an approximate quote of up to EUR 1000 ($
> 1200) for a display replacement. They would not consider the inverter
> as being the problem, which means that they will replace the display in
> any case, or in the worst case the display+inverter. This is
> economically not viable, so I consider looking for a defective machine
> with a good display to revive mine by myself (it's a 1GHz).
> 
> My question to the list is: are displays and inverter boards / cables
> the same across the entire DVI range (667 MHz to 1GHz), or the 1GHz
> shares parts only with the 867 MHz? Scouring websites offering PB
> parts, I've come across contradictory information. Many do sell display
> assemblies working for 667 MHz to 1 GHz, others have separate parts for
> 667/800 and 867/1000. Useless to say, would anyone have a good display
> to throw away, throw it my way :-)

I can't answer that question but I would suggest you send an email to John
Meismer at PowerBook Parts  and ask him. I dealt
with him in the past and he has always been friendly and professional
whenever I had a hardware question. I've always been very satisfied with his
services and highly recommend him.

-Laurent.
-- 

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mailto:[EMAIL PROTECTED]Washington, DC, USA
 Usual disclaimers apply ***


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TiBook display replacement (was: TiBook display crisis)

[gianfranco sciacca]

Thanks to all who gave suggestions to try and tackle my 15" TiBook 
display problem. Unfortunately the display is still dark with brief 
flashing at startup and the "explosion effect" after shutting it down 
or sleeping it is visible also in daylight.

A local Apple Centre gave me an approximate quote of up to EUR 1000 ($ 
1200) for a display replacement. They would not consider the inverter 
as being the problem, which means that they will replace the display in 
any case, or in the worst case the display+inverter. This is 
economically not viable, so I consider looking for a defective machine 
with a good display to revive mine by myself (it's a 1GHz).

My question to the list is: are displays and inverter boards / cables 
the same across the entire DVI range (667 MHz to 1GHz), or the 1GHz 
shares parts only with the 867 MHz? Scouring websites offering PB 
parts, I've come across contradictory information. Many do sell display 
assemblies working for 667 MHz to 1 GHz, others have separate parts for 
667/800 and 867/1000. Useless to say, would anyone have a good display 
to throw away, throw it my way :-)

cheers, gianfranco
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Re: TiBook display crisis

[gianfranco sciacca]

>  The briefly flashing screen, hissing sound, and uneven illumination 
suggests that your problem is with
>  the inverter circuitry that drives the LCD backlight. If the other 
suggestions don't work out,
>  replacing the inverter board might work ($84.50 at 
http://www.wegenermedia.com/titp.htm).
>  Although the inverter is located under the optical drive in your 
model of PowerBook, cleaning fluid could have
>  shorted the backlight connector.

ok, following the suggestions, I let it rest for some 48 hours. I also 
pulled the bottom cover and visually inspected it just for the sake of 
it. No visible traces of anomalies. If I understand Ben's suggestion, 
some fluid might have shorted the backlight connector, thus damaging 
the circuitry at the inverter. Just to make sure I understand this 
right: fluid might have infiltrated in the display assembly, as I 
exclude that it could have reached the backlight connector at the 
inverter board. Could this lead to the problem you suggest? I ask this 
as I don't know how the circuitry looks like inside the display 
assembly.

I just add a few details in the hope that someone with experience with 
LCDs could catch a hint: currently the machine seems to work all fine, 
S-video out works OK. I could not try an external display, but I assume 
it would work as well. The PB display now flashes briefly with some 
luminosity at the right side fading to black towards the left side when 
powered up (startup), after waking from sleep, after changing 
resolution. The hissing sound no longer occurs. Then again the flashing 
is no longer at max luminosity. Bulb fried as well?

An oddity I have noticed is the following: I have run the machine in 
the evening with a light pointed towards the screen in order to be able 
to see the minimum to click around with the mouse. I have noticed that 
when shutting down or putting it to sleep, the display first goes pitch 
black, after a second or so a sort of dark yellowish light (very low 
intensity) diffuses from the top right area to cover the entire screen 
area in 2 or 3 seconds. It resembles a screen saver featuring an 
explosion! The screen then stays like this, i.e. not pitch black. This 
is to be seen only when shining a light towards the screen, it may be 
as well normal and one does not see this during normal operation. Of 
course I can see nearly nothing else if not pointing a light to it, but 
it's certainly not the normal way to run a PowerBook!

An Apple centre would ask me to leave the machine for a quote on the 
repair, which would cost me already quite an amount, so before doing 
that I hope to be able to figure out whether the problem lies simply 
with the inverter board or if more likely the display must be replaced, 
hoping to do it myself. Well, I've heard that the latter is quite a 
job, opening the display assembly is a half-nightmare. By the way, can 
the clutch covers be removed and replaced simply by removing/replacing 
the two screws securing each of them? Or is some gluing involved?

Thanks again for any advice and cheers, gianfranco
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Re: TiBook display crisis

[Richard Clark]

Yes i know my newton died i'm working on getting it going again gonna 
send it away today.
On 29 Sep 2004, at 6:54 AM, E. Moorhead wrote:

Hey Richard...
	Below 'Link' doesen't work???
Richard Clark
NPDS:http://mawgadogsnewt.homeip.net(down at the moment Newton is fried 
let's see what Frank can do)
ichat:mawgadog33
Yahoo:Ozzy_Wells
Skype:mawgadog
icq:115390002

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Re: TiBook display crisis

[E. Moorhead]

Hey Richard...
Below 'Link' doesen't work???
e
--
Hail MAC

On Sep 27, 2004, at 1:48 PM, Richard Clark wrote:
[snip]
NPDS:
!
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Re: TiBook display crisis

[Ben Dyer]

The briefly flashing screen, hissing sound, and uneven illumination 
suggests that your problem is with the inverter circuitry that drives 
the LCD backlight. If the other suggestions don't work out, replacing 
the inverter board might work ($84.50 at 
http://www.wegenermedia.com/titp.htm). Although the inverter is located 
under the optical drive in your model of PowerBook, cleaning fluid 
could have shorted the backlight connector.

Hope this helps.
-ben
On 28 Sep 2004, at 02:55, gianfranco sciacca wrote:
hello folks,
I've cleaned some hours the display of my 1GHz TiBook with a spray 
product and a microfibre cloth. All was well, I booted it up as usual, 
then logged on. But only in a matter of minutes the screen went dark. 
It wasn't sleeping, the screen went to the lowest level of luminosity 
(when the screen picture is only barely visible), although the 
luminosity setting was still max (one can still see the settings, 
while adjusting the luminosity). I then restarted the machine a few 
times (also reset PMU) and the symptoms are as follows:

after powering up, the boot procedure is normal. The screen flashes to 
normal luminosity only for a fraction of a second right before the 
apple appears at screen centre (I believe this is when the screen if 
first powered at booting time). Simultaneously to the flashing, a 
noise is heard, sort of white noise, apparently coming from the area 
where the Power board is. The flashing is usually very brief, only 
once was lasting a whole second or so.

The other thing I just noticed is that when opening the lid after 
having slept the computer, some light comes to illuminate the screen 
for a second or so, higher (but not full) intensity at the 
bottom/right side (where the video cables are fed through), fading to 
dark towards the left.

The product I have used for cleaning is a spray suitable for TFT 
display, but I was told it is fine also for notebooks (there's also a 
notebook picture on the bottle). What have I done there? Perhaps some 
drops have penetrated somehow in the machine? Or have I damaged the 
LCD for good? Any hope to recover this beast, or idea of what to look 
at? I never had any display issues in the past on this machine.

thanks in advance for any precious suggestion. cheers, gianfranco
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