[TMacie]

Hi All,
I pulled the CD73 stereo on my 2006 E90 to replace the screen last night. Got the screen replaced. I am confident that the ribbon cables are correct and seated well.

When I put the radio back in, it doesnt light up or turn on. The climate controls also dont light up or turn on. Fuses look good, but the symbols on the diagram arent exactly intuitive.

Any help would be appreciated.

Thanks,
Travis

[TMacie]

A little more info. I swapped the screens back to see if the new one might have been the issue. The same issue exists with the old screen now. When I first get into the car, the button lights are lit and such, but nothing ever turns on.

Travis

[TMacie]

And a little more.....CCD came back today, that works fine. The backlights on the CCD and radio work fine but the radio and the info parts that go with it, don't work.

Travis

[ctuna]

What kind of condition is your battery in ?
As you can drain the battery while working on the car
because it will stay awake. Also if you have an 06 with an
original battery you are due for a new one.

Read about IBS in the first pdf.

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

[TMacie]

Battery was replaced last year. Car was driven multiple hours the day before, and I drove it 30 minutes to work this AM.

Thanks for the links. I will look them over.

Travis

[ctuna]

If you disconnect the battery.
The heater controls turn off and the display is dead on power up.
I didn't know it did that or that you could turn off the display by
turning the fan all the way down to zero . It kind of threw me for
a loop when I installed my stereo.
Hitting plus on the fan button powers it back up.

[TMacie]

I didn't disconnect the battery for this, there really wasn't any need to. The Climate controls work fine now, the radio still doesn't work though.

[andrewjmcd]

I'm in the same boat.

I replaced the LCD and plugged it in and saw the diodes glowing, I had forgotten the orange diffuser (head slap).

After putting the diffuser in, the radio doesn't turn on but still getting some power to the some of the buttons

[TMacie]

Welcome to the club. If I find a solution, I'll post it up.

[TMacie]

No solution yet, but I get power and ground at the plug. The MOST fiberoptic at the plug lights when I shine a flashlight into it. So the car end of that is working. I dont have a good way to power the radio out of the car yet, so I dont know if the radio MOST is lighting. Onward with the saga!

[Meeni]

Maybe some theft deterent strategy ? Just throwing the idea around, good luck.

How hard was replacing the screen btw, mine is dead as well.

[TMacie]

I dont think its theft deterrent, as I've never read anything like that....

The screen replacement is easy, if you search there is a good tutorial on it here. The soldering is simple as its just a mechanical connection to keep the cage in place. If you don't know how to solder, you may want to practice on something else first.

Travsi

[andrewjmcd]

Do you have the SOS call warning in the dash?

[TMacie]

Yep SOS dings when I put the key in.

I picked up another radio that works. Funny part is, the SOS thing went away for a few days once I put that radio in. Now all of a sudden its back. Everything else works fine though.

Travis

[ctuna]

If you are not used to doing this kind of work .
Send it in .

There is a place on ebay that does the repair or Becker auto sound.

[TMacie]

That's the thing. I am used to doing this work. I have no trouble admitting that I must have screwed something up. I just can't see where. I know what to look for in "fried" electronic components. While they don't have to look bad to be bad, this is a simple enough procedure its shouldn't have fried anything.

[ctuna]

At some point its not worth the Headache
of trying to do it yourself. The connectors are really tiny
on that thing.

There is always the chance of pushed in pins and badly seated
connectors both on the front and back of the radio.

[TMacie]

You are right, its not really worth it except for the part that I like to know what happened. I'm treating it as a learning experience.

These connectors are actually larger than what I'm used to. I've had it back apart a few times. I am familiar with what to look for on these types of connection and even under a magnifying glass everything looks proper.


Travis

[ctuna]

They mentioned something about the new piece
came covered with a protective tape on the contacts.
The first time I did similar PC connectors I messed them
up as I didn't know how they released.
Maybe you get a bad new part.

Also the electrical system in a BMW can really throw you
some curve balls.(Due to the IBS and how it reacts to low battery
power)

electical e90 pdf
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU
http://www.google.com/url?sa=t&rct=j...85464276,d.cGU

[andrewjmcd]

I also got a new radio but now I don't have any audio.

I've checked the radio fuses but they all look OK.
The amp fuse I haven't been able to find in the limited time I had to look for it.
2006 325i stock amplifier.

[Meeni]

If you replaced the radio I believe you have to register it with the CAN ecu for it to be recognized.

[ctuna]

The radio has to be programmed to sound system and
whatever options you have on the car.
The radio has a possibility or being programmed for three
different systems.
base , Hi Fi and Top Hi Fi the last is also called L7.
If you put a radio in Hi Fi or Base system car that has been
programmed for L7 you will get no sound.

See explanation in the following link
http://www.e90post.com/forums/showth...ght=bimmertech