Some may remember how I asked, about 6 months ago, about missing pixels on a
SID display (pardon the redundacy, since the acronym stands for system
information display, I guess). Shortly thereafter, on a scheduled service,
the SID unit was replaced entirely under warranty. Just making some
conversation, I said I was someehat worried about the SID's reputed tendency
to fail, and thus even questioned the need to replace it because a few
pixels are randomly missing. I was however told that this was a 2005 SID
unit, a new and much improved model, with all deficiencies ironed out.
Since I own a '02 9-3 SE convertible (w/ every package available, and love
it) and the warranty was about to run out soon, before pikcing up my car
from the service I went over to the sales room and got myself a decent deal
on a complete extended warranty package, which covers even more than the
origina warranty. Thus, I can take whatever happens in the next couple of
years with some humor, and worry later depending on how long I really end up
keeping the car (which I hope is very long, that's why I bought a Saab).
Yesterday, upon starting up the car, I noticed the SID had gone totally
dead. All in all, I don't think the information it displays is vital to
operate the car, so it's amusing how little it bothered me *none* of the
pixels were working - at least it doesn't look broken, it just looks like
one chose to turn it off (which should be an option Saab ought to consider
given the device's reliability or entertainingly ridiculous lack thereof).
However, what seems silly is that the SID seems to incorporate odd pieces of
lgic for other components of the car that get seemingly randomly routed
through it. Witness the fact that, while the blinkers work, the audible
blinker clicking noise will only work randomly now that the SID broke. Also,
if the music is playing and one tries to turn the volume up with the
steering wheel mounted controls, the volume will rapidly crank up all the
way to max volume upon touching the "up" button, which is rather alarming
with the premium stereo watts available in the '02 SE (adolescent drivers
might love that feature, though).
Odd, from an electronics design point of view, what functions Saab somehow
decided to partially route through the SID for what seems to be no reason
whatsoever. The function of the SID just seemed to be the one of an
integrated calculator for some functions - the fact such an unreliable
device seemingly implements some *functional* stuff seems to be a poor
engineering decision.
I'll get this thing replaced as often as required, I mean, come on, there is
no excuse for this device being as unreliable as it is, and Saab ought to
perhaps simply open the specifications to some aftermarket people that do a
more competent job.
...pablo
Colin Stamp - 15 Jan 2006 20:59 GMT
You'll probably find that the horn is now intermittent too, and that
the dashboard dimming doesn't work properly either.
In Saab's defence, this isn't a failure mode I've heard of before on
SIDs. The very common fault is in the way the main board connects to
the glass display panel so it only affects some of the pixels, not any
of the other functions. You seem to have a much rarer fault - consider
yourself privileged ;o)
Cheers,
Colin.
pablo - 18 Jan 2006 03:53 GMT
> You'll probably find that the horn is now intermittent too, and that
> the dashboard dimming doesn't work properly either.
Yikes, how did you know?? :-) I hadn't even noticed that until you pointed
it out. Car's going in next week.
...pablo
Colin Stamp - 18 Jan 2006 18:29 GMT
>> You'll probably find that the horn is now intermittent too, and that
>> the dashboard dimming doesn't work properly either.
[quoted text clipped - 3 lines]
>
>...pablo
I ran my car for a bit without the SID whilst I had it in the shed
trying (and failing) to work out ways of fixing the dead pixels...
Cheers,
Colin.
meld_b - 29 Jan 2006 12:48 GMT
Hey - I've got dead pixels too... So can you tear these apart and work
on that connection? I've seen this "zebra rubber" connections to LCD's
before that if you wiggle it around you can get it back working. Of
course I've also seen stuff bonded together so that you can never take
it apart at least not in a state were you can get it back together.
Maybe more importantly - how do you reset this thing once you take it
out. Sorry - that's probably been discussed a lot.
I think my pixels have been out for ~2 years... Luckily it's every other
row so I can still read it. I had a friend who wasn't familar in there
and his incredulous "What does THAT mean" was really pretty funny. I
said it's "Klingon" 8-)
-MELD
>>>You'll probably find that the horn is now intermittent too, and that
>>>the dashboard dimming doesn't work properly either.
[quoted text clipped - 10 lines]
>
> Colin.
Colin Stamp - 29 Jan 2006 13:37 GMT
>Hey - I've got dead pixels too... So can you tear these apart and work
>on that connection? I've seen this "zebra rubber" connections to LCD's
>before that if you wiggle it around you can get it back working. Of
>course I've also seen stuff bonded together so that you can never take
>it apart at least not in a state were you can get it back together.
It's a bonded-on flexible cable I'm afraid. From what I read,
sometimes the bonding fails and sometimes the conductors in the cable
fail. A lot of people with failed bonds have been able to get it going
by using rubber strips to increase the pressure on the cable. Mine was
down to the conductors, so nothing worked. I farted about for hours
trying to completely replace the cable with wirewrap wire glued to the
glass with conductive epoxy. Unfortunately, the cable pitch is really
fine, and it was a bit of a frustrating job. Eventually this resulted
in the whole unit becoming broken into a thousand pieces - My foot
must have slipped, repeatedly.
>Maybe more importantly - how do you reset this thing once you take it
>out. Sorry - that's probably been discussed a lot.
There's no need to reset it. It just works when you plug it back in.
If you buy a new unit though, you have to take it to someone with a
Tech 2 to tell it what car it's going into.
Cheers,
Colin.
Bill Jackson - 29 Jan 2006 17:30 GMT
from what I've been able to see, it's not held on with conductive glue but
hot bar soldered. I looked at mine under a microscope at work. It's
convenient to have electronics techs working with you!
The real pisser is that I finally broke down and bought a new one, $500
installed and it's been just over a year, and just out of warranty, and it's
started all over again.
>>Hey - I've got dead pixels too... So can you tear these apart and work
>>on that connection? I've seen this "zebra rubber" connections to LCD's
[quoted text clipped - 23 lines]
>
> Colin.
Colin Stamp - 29 Jan 2006 18:54 GMT
>from what I've been able to see, it's not held on with conductive glue but
>hot bar soldered. I looked at mine under a microscope at work. It's
>convenient to have electronics techs working with you!
That might be the case at the PCB end, but they'd have awful trouble
soldering anything to glass!
>The real pisser is that I finally broke down and bought a new one, $500
>installed and it's been just over a year, and just out of warranty, and it's
>started all over again.
Now that's *really* annoying. You have my sympathy.
Cheers,
Colin.
Bill Jackson - 30 Jan 2006 02:02 GMT
oh yea, you're right.
The issue (at least with mine) was not the glass end but the PCB end. There
is WAY too much strain on the flex and it causes delamination of the
conductors, which then break.
sorry for the confusion
>>from what I've been able to see, it's not held on with conductive glue but
>>hot bar soldered. I looked at mine under a microscope at work. It's
[quoted text clipped - 13 lines]
>
> Colin.
Colin Stamp - 30 Jan 2006 18:23 GMT
>oh yea, you're right.
>
[quoted text clipped - 3 lines]
>
>sorry for the confusion
Yep. I think mine failed the same way. I had it powered up on the
bench and pushing on the contacts didn't bring the pixels back, but
flexing the cable did. I just couldn't find a cable position that
allowed it to work reliably with the case on.
Other's have said they've had good results just by increasing the
pressure on the contacts though, so either there's another failure
mode, or the cable disturbance is randomly sorting some units out.
Cheers,
Colin.