Backcover Question (broken sensor)
 

Ok so i broke my backstand couple of weeks ago and i had to buy a back cover replacement, found this backcover on ebay and i bought it..but there's a problem with the new backcover

The slide sensor for the camera is not working, and it cannot detect my mmc :(

As you can see on the pic below,

A = my original backcover
B= the new backcover
C= Mugen Backcover

http://i957.photobucket.com/albums/a...rto/N900_B.jpg

Trying to figure out the difference, so I've marked the differences in circles,
i have a question, is the one circled in red a magnet or just a paper? Because that's the only difference with the original cover..

Also the one marked in blue circle seems to be a magnet no?
Mugen does a good job in making backcover, all functions are working properly, so that little piece of metal must have some kind of function..

thanks before

Re: Backcover Question (broken sensor)
 

The new one is missing the magnet that the phone uses to detect if the cover is on or not.

The mmc is forcibly unmounted whent he cover is removed.

Your new el cheapo cover has no magnet, therefore the phone believes the cover is missing ergo the mmc is never mounted.

Re: Backcover Question (broken sensor)
 

I really thought after all this time the device has been out that everyone knew about the magnet attatched to the rear stand and what happens if it is not there.

The mind boggles lol

Re: Backcover Question (broken sensor)
 

I knew it :(
thanks for the explanation..
So i guess i;ll have to look for magnetic tape huh?
and does the color matter?
Does it have to be black and white like the original one?

I thought it's just a piece of paper since it's very thin..

Re: Backcover Question (broken sensor)
 

This is why i again must ask if we should make a buyers guide for parts/accessories, i will still handle the battery's

Re: Backcover Question (broken sensor)
 

The magnet is not a moving part, it just sits there so N900 can detect if cover is present or not.

If cover is present, an IR reflectivity sensor is activated, which sees if the white or black part of the lens cover is infront of it.

Your second cover doesn't seem to have any white/black marking on the lens cover?

Re: Backcover Question (broken sensor)
 

I could not really see the pictures you posted, but here's my sharing on my back cover experience.

1) Spring loosen. This happend while I was cleaning the back cover and somehow the spring got detached. This cause the cover to slide on it's own. Fixing this was rather simple and need to be delicate in getting the spring in place.

2) Broken "L" clip (in your second pic was the silver piece). That piece broken off and I had problem to detect the MMC. UHU-glued it and now working well again. Note: UHU is not as strong as some super-glue, but I didn't want to risk the stronger stuffs eating away the plastic. Keep the UHU glue around in case it comes off again.

Hope the above helps!

Re: Backcover Question (broken sensor)
 

I tried putting a black white paper which is exactly the SAME with the original one but it still doesn't work...
Is it made of certain material?
Is it magnet?

I don't think i have both problems, but thanks for the advice, i'll keep that in mind

Re: Backcover Question (broken sensor)
 

Is it really the magnet attached to the rear stand?

My N900 has one magnet "within" the rear stand and one
in the opposite position as part of the back cover.
Makes a snappy noise when the rear stand is put back to
the rear cover as the two magnets hold each other of course.
Quite a filigree issue.

I guess the magnet that is part of the back cover is the important one and not the one within the rear stand?

Re: Backcover Question (broken sensor)
 

By the way, what's the advantage of having the cover activating the MMC? Some poka yoke concept to ensure back cover is on before using the phone? I think the back cover is pretty obvious enough not to miss intentionally?