I thought that I had read all of the threads possible (there are MANY) regarding the LCD issue...

My C5 was exhibiting display issues, and It was my thought that it was probably a cold solder joint, or two.

I easily removed unit, stripped it down to get at the LCD, and touched up the solder joints...no problem...slight improvement when i plugged it in to test it, so i re-assembled everything...and then...

This morning I went out for a drive, and the display is giving me random vertical lines, beeping, tach and speedo needles randomly working/not working, traction control light came on with abs light (after I purposely spun the tires on the snow in the alley). When i turned off the ignition, and restarted the car, it was like nothing was ever wrong (and the abs worked fine)...then it started doing it again.

Obviously, "the bird" is unhappy with me.

I had a trip planned for this coming tuesday, but aam unwilling to make things worse by driving it, or get stranded all together by the imobilizer.

QUESTIONS: will driving it in this state make things worse, or not...is there any chance that this random madness will leave me stranded by the side of the road?

I plan to send it out to have the display replaced by someone else, not that I am not capable, but I'd like to have them check out the random madness the display is exhibiting - looking at moduleMaster to do the work...comments?

Thanks gang...

 

I went to pull the bird back into the garage, I had to start it three times - it would run for about 2 seconds, then die. Each time, i had the interlock symbol lit on the dash display as though everything was fine.

hmmmmm...

 

Sounds like the immobilizer has been triggered. Might just be a plug on the display that is not firmly snapped in...if you're lucky.

Or maybe you bridged two solder points when you were resoldering.

When stuff like this happens to me, I normally just inspect everything that I did and reassemble. Nothing to lose at this point.

 

That's what I'm thinking...nothing to lose.

I suspect that it's either a solder bridge, or perhaps some flux residue that is allowing some imatient electrons to run "*****-nilly" around the circuit board.

Given the random-ness of the issues, I'm leaning towards the flux issue, and have bought some cleaner...display is out, and I'm about to tear into it again.

I'll post my results...if all goes well, it will be a happy post.

 

ah FLUX!

Ya, that's right, FLUX.

Flux residue allowed a path for those little electrons to run amuck.

For those of you who experienced abs lights coming on after doing this repair, and other random weirdness that never occurred before, ty removing the cluster/board again, and cleaning it thoroughly with circuit board cleaner...

...washed all my pain away...except I still need to order a new lcd and install it. Small beans considering the alternative!