Tom's Guide | Tom's Hardware | Tom's Games
![]() |
![]() |
![]() |
Hi.
I get some random blue streaks on my monitor, especially when playing Quicktime movies or looking at images with a lot of blue in them. I've restarted with the CD, and I get the same,but when I restart normally, it's OK sometimes, and worse at others.
It's a slot-loading iMac, running 9.0.4.

Thanks for your suggestion.
The only update it finds is the update for itself :(
Any other ideas, pickle ?

Thanks again, pickle.
I installed the update for the software update. It said I needed the CarbonLib update. I installed that as well, then restarted. Same problem.
I think it must be a hardware thing, unlesss anybody can say otherwise.

A few other things I forgot in the previous.
If I run the Quake Arena demo it's mostly okay. There are some minor graphical glitches, but nothing major - just a few streaks and "snow" on some textures. That's also true of Unreal - there are some streaks but nothing serious. With any image program - Graphic Converter, Photoshop, Quicktime Picture Viewer - there's a lot of blue smearing and streaking which gets worse when I scroll around. But it's different when I startup with the CD. There are some JPEG-like artifacts on some images but not others.
I'm starting to think about taking it to a dealer - it's out of warranty - because I'm completely puzzled.
Thanks for your help again, pickle.

I find it very hard to believe nothing else showed up since you're still running 9.0.4. There are 3 updates past that - 9.1, 9.2.1, and 9.2.2 - that should get updated as well.
If SWUpdate doesn't see 'em, grab em from Apple's site.
p

Damn, that's a 70MB download ! To start with !
I'll get back to you when I've got it.
Thanks again, pickle :)

Okay.
I've downloaded and installed the 9.1 update, and it's still here. I updated the Firmware too, and it's still here. Am I going to have to update to 9.2.1 and 9.2.2 as well ? :(

Okay. It's nearly 5am, I've just finished downloading and installing the 9.2.1 update, and I've still got the problem.
I suppose it's the 9.2.2 update now ? :(
But what am I supposed to be fixing here ? Is it a driver problem, or something to do with Colorsync, or is it Firmware ? If I knew what the problem might be it would help to keep me going.
:( (again)

Tints are adjustable in both "Normal &
Theater" mode. Problem is, you have to
be an authorized Tech to get the CD tool
for it.I've read all your messages. Trust me! If
you have STREAKS then you have a
hardware issue. All the updates for 9 (or
any other OS) aren't going to help you one
bit.

Bad video drivers have been known to cause this sort of thing before. Without a screen shot or photograph of what's going on, it's hard for me to say exactly what he means, though.
p

After seeing Charles's screenshots, I can say pretty conclusively that this is a software problem, not a hardware problem. A hardware issue - at least, one with the display itself - wouldn't show up in screen shots. One with the video card *might*, but I tend to doubt it.
See if performing a clean installation of the OS and then doing the various updates helps any.
p

Well this is really something. I did a clean install, then the updates again, and The Blue Rain is still here.
Two things I noticed though - when I started up with the fresh 9.0.4 the problem was noticably worse. Each update seems to have reduced it. Also, I played those Quicktime clips again from starwars.com, and the actual video part was affected, but not the surrounding window graphics. It seems to affect 2d images which have to update quickly - like QT movies and scrolling image windows. On Netscape 6 right now, the toolbar is OK and so are the ads and graphics on this page.
I'm going to download the 9.2.2 update as well - I figure if I've gone for 160mb already, another 20 or so isn't really going to hurt.
Thanks for your help again, pickle.

One thing I forgot - it doesn't affect the "starting up" screen either. It's only after the extensions have loaded. But - strangely - it was the same when I used the CD. Is there something I'm missing here ? I don't see how a software problem can affect a CD startup, or how a hardware problem doesn't affect everything equally. Could it be a virus ? <:(

Sounds like a problem with the video drivers to me, but I have no idea why a clean install didn't fix it. At this point, your guess is as good as mine...
p

When you say "clean install" do you mean the install option which creates a new system folder and disables the previous one, or reinitialising the disk and starting from scratch ? That's what I'm thinking of doing next if the 9.2.2 update doesn't work.

Here we go again.
I did the 9.2.2 update. No change.
I downloaded Apples "Display Adjustment Utility" from a tech help site, and tried out the test patterns. In the red, green, blue, black, and white patterns, there's no problem, but in the grey bars, there are two lines running vertically - one blue, the other yellow, and there's a white line at the left edge. I'll send you the screenshot so you can see for yourself.
I'm gearing up to wipe the disk and start afresh - I don't think it'll help, but I'm gonna do it anyway.
Thanks for your help again, pickle. If you can offer anything else, I'll appreciate it.

Sorry to hear. At the same time I don't
think that an erase will fix the prob. I had
a nightmare with "tint" after my analog
board was changed in my Ruby 450 DV+.
Come to find out the idiots never adjusted
the Black to grey to white shades as
you've mentioned. I say this because the
Tech that Apple dispatched to my house
told me distinctly that Lines or
"STREAKS" are not a driver prob. He said
that I was lucky it was tint. Though I have
AppleCare I would've had to wait about 2
weeks for them to get the parts to repair
it.Use Logic Charles. If you've already
done a clean install, then you have a
Brand New computer. Like it's right out of
the box. That rules SOFTWARE out.
Sorry. Can you send me a screenshot?Later

"whatsyourprob," do you understand that if this is a hardware problem, there are *very* few circumstances that would cause anything to show up in a screen shot?
p

Sorry Pickle but a screenshot is simply a
photogragh of what's on the screen. If it's
hardware or software that's the prob, it's
going to show it either way. It's a Carbon
Copy remember???You should've saw this tech. The guy
was like a little Wizard. He had tools that
one would think could only be seen in an
operating room. I'll stick with his advice.One more thing. I apologize beforehand
because I can't remember if it was you or
Andy that was talking about checking
"Internal" cables. It's always a good
choice to let people know that they can
easily get Bar-b-qued . It's called DEATH.
I don't care if it's unplugged. The monitor
has to be dischared. So people!!! Be
careful.
TOUCHDOWN SEAHAWKS

A screen shot is a high-level snapshot of
what the OS thinks is supposed to be
displayed on the screen.For instance, you could disconnect the
screen entirely and still take a screen
shot. Ten-second quiz: What would the
screen shot look like in this case?If you answered "black," you failed.
There are a LOT of things that can
happen between hardware and what the
OS thinks is on the screen, which is why
this is much more likely to be a software
problem if it's showing up in screen
shots.p

I wiped my disk and - as I expected - there's no change.
I'm going to try resetting the PMU, and if that doesn't shift it...>:(

Well, he wiped the disk clean. That rules
software out. I quote,Tints are adjustable in both "Normal &
Theater" mode. Problem is, you have to
be an authorized Tech to get the CD tool
for it.I've read all your messages. Trust me! If
you have STREAKS then you have a
hardware issue. All the updates for 9 (or
any other OS) aren't going to help you one
bit.
It seems to me that your monitor is either
continuously re-calibrating or it can't
calibrate 100%. Analog board is pobably
gone.
TOUCHDOWN SEAHAWKS

Okay, whatsyurprob. If it's hardware, it would show up everywhere on the screen, right ? Well I'm looking at a window in Netscape right now which isn't affected, but the desktop picture underneath it is. if I open an image file in any program, it looks okay until I scroll. If there are any blue areas, it's worse. When I startup, the glitches don't show on the "welcome" screen. It seems to kick in just before the extensions start loading. If i startup without extensions it's the same. I use a 3d app which shows an OpenGL preview, and that's affected only when I rotate the view. In wireframe mode, it shows up as a shadow on some lines, but not others. In Quake, some textures show a white noise, but most of them don't. It's the same in Unreal. All of those are dependent on the hardware, right, so wouldn't they suffer the worse ?

Well you didn't tell me all that. Even so,
use logic Charles. If you wiped the disk
clean and re-installed from your OS9
install CD how can it not be hardware?
What you'd be saying is that your
computer came with bad software. You
know that isn't the case right?Why do most people want to turn to
software when there's a prob. How many
micro-transmitters are there in a
computer. And doesn't every single one
of them have their own function? What if
one of them decides to take a crap on
you. Or how bout a group of them that are
supposed to work in comination and
concert with each other?Does that ruin
your entire computer? Then again, there
could also be an external device that's
divvying out some kind of corruption.
Hardware can flaunt havoc on a system.
Just because it only does what it does
when you do this or that doesn't always
mean it's a software issue. You proved
that yourself guy.
TOUCHDOWN SEAHAWKS

What I'm trying to do, whatsyurprob, is exhaust every possible method of fixing it myself before I take it to a tech. We all know that that option won't be cheap, especially since my machine is out of warranty. I've read on the Apple support boards that a new analog board can cost up to US$300 to replace. That's about £250 I think. I can't afford that right now. It's also possible that I have a firmware problem, but I've updated that to no avail. The other option is the PMU chip - it can cause numerous problems throughout the system and it can be reset by opening the machine. That's something I wanted to avoid, but I've tracked down a service manual, and I know how to get to it now, so I'm more inclined to try. If that fails, it's either call in a tech, or live with it - whichever is the most afforable.
BTW, did you get my screenshots ?

Yea, I got em. Your correct about your
grey bars. I see that you have two solid
black bars. Your in bad shape when it
comes to shading. Also, if you look real
close at it, there's a slight pink to the
entire shot. Remember I spoke earlier
about the tint? I just went through this.
Well this part anyway. It was just an
adjustment was all. But can you get the
utility tool so you can do it? Again, as I
said earlier, it's my understanding that in
order to legally obtain one you have to be
an authorized Apple Tech. But if it's not a
prob, remember to adjust both normal
and theater modes. That's very
important.The choppy texture IS a hardware issue.
Looks like a problem with streaming
ie.CALIBRATION. Sorry but, Analog.
Have you noticed anything different about
your iTunes. Do the visuals work properly
on every setting? Are there any waves to
them? Let me know. And for Gods sake,
be careful about jumpin into that
machine. Later
TOUCHDOWN SEAHAWKS

I just did a brief try of iTunes. the visuals don't seem to be affected. I'll try more later.
This utility you speak of - is it the Display Adjustment Utility ? I found that on a tech site somewhere - it was a link from one of the Apple discussions.

Yes it is Charles. But there's several
different ones. It all depends on what you
need to do. Follow me? Also, you
might've found a link to it, but try and
purchase the one that adjusts your grey
bars and Tints. The tech that came to my
house wouldn't leave the installer on my
Desktop. He actually told me that there's
an encoded log on the CD as to how
many times the installer has been used
vs. how many times its been retrieved. If
they don't match up it's his job. I kinda
think he was pullin my chain. but then
again, I even offered him $20.00 to leave
it on my Desktop. Sorry he said. Can't do
it.Anyway, do you agree with me that you
have a pink tint in your grey bars. Also,
your first black row looks like it has some
blue to it. Look at it real close. It
definately need adjusting like mine did.
Conerning this prob, you should be
worried about what caused the tint
change. Mine was do to incompetency
on the part of a Apple certified provider
that changed the analog board then not
doing the adjustments properly. Again,
what did it to yours?I wish I could give you more input on that
texture. I still say it has something to do
with the streaming, ie. calibration. I really
have thought about this. I even
mentioned it to Apple. You know, like it
was my 700 Graphite computer. (Both
my computers have AppleCare. For
$149.00 on each computer, you can't beat
it.) Their willing to dispatch another Tech
to my house to change my 128 rage card.
and whatever utility Tool they need to
correct the prob.. I don't agree with them
but, they're gonna be fittin the bill.
Remember, I acted like it was my
computer to "Your" troubles. So that's
what they said.
TOUCHDOWN SEAHAWKS

I suppose I should call the dealer I bought from before I go opening the machine. Just to get a pointer on the cost.
I did see the pinkish tint on the grey bars - it's very slight, but it is there.
Thanks for the help, whatsyurprob.

Pink tint on your screen doesn't mean
anything unless both your monitor and
Charles's monitor have been calibrated to
the exact same colour profile.And yes, I'm saying that there may be a
bug in the drivers. That's the only
reasonable explanation for the streaking
*not* being consistent across the whole
OS *and* showing up in screen shots.Again, if this was a hardware problem,
ESPECIALLY on the analogue board,
there's NO WAY it could show up in a
screen shot. The analogue board merely
takes signals that the video card puts out
and converts them into signals to control
the electron gun in the CRT. The screen
shot is a digital record of what the OS
sees the video card putting out, not what
the OS sees on the CRT. The OS has no
idea what the CRT is doing. None. Zero.
Zip. Zilch. You can mess with the
adjustments on the analogue board all
day and it won't do a damn thing for the
screenshots. This CANNOT be a
hardware problem on the analogue
board.The ONLY way this could be a hardware
problem is if the problem is on the digital
side, with the video chip itself or its
associated digital circuitry.Given that the problem is not consistent
across applications, the odds of this are
pretty low.p

Hey, pickle.
I haven't got OS X, unfortunately. I'm between jobs too, so I can't grab it just yet, but I will do as soon as I can - I figure it's worth it after all those updates.

Okay, you two.
I've done some renders, and checked them on another machine, and they're fine. I can send them to both of you if you want, but it's a 1MB Stuffit archive so only if you really want me to. As far as I'm concerned, if the renders are okay, I can live with it for now, until I can afford a new machine, or the repair bill. :)

![]() |
![]() |
![]() |

This post is quite old and has been locked from receiving new replies. Please create a new posting instead.
| Ads by Google |