A85 dark screen - dissassembly help requested

[Christopher_P]

Hi folks,

I've got a Powershot A85 that I've had for about 1.5 years. In the last couple of months I've had problems with the TFT display being dark. The display is definitely on, however it looks to me like the TFT backlight has failed. At times the backlight seems fine, and then fades out so I wonder if it's just a bad connection.

I've tried to get the back cover off so I can inspect the power connection for the display but I've been trying to figure it out as I go as I haven't found any manuals or guides. The A85 spare part needed thread (http://www.dcresource.com/forums/showthread.php?t=18151&highlight=screw) has been quite useful, but I've not yet been able to get the cover off. I assume that I can take the back cover off independantly of the front?

So far I've removed the 3 screws on the bottom, 1 on top of the memory slot, and 1 by the USB port. I'm struggling to take out one of the screws in the memory slot, marked red in the first image below. I've loosened it but it won't actually come out.

I've also included another view to illustrate my progress so far.

Any help is much appreciated!

Cheers,
Chris

[BowerR64]

remove those 2 by the battery door, then there is 2 inside the battry compartment. One is under the backup batter button by the USB port.

You almost got it, there are screws on the bottom half of the camera then the 2 halfs connect at the top. here (http://www.artecdesign.ee/~jan/Kaamerad/PowerShotA70/index.html) is a link that has some good photos of the disasembly. They are of an A70 but the A85 is almost the same as far as how the parts are put together.

The backlight could be a connection problem. It is fairly easy to get to once you have the covers off. it is a connector on the bottom you may need to push in more.

[BowerR64]

The small connector is the power to the display and the backlight.

http://www.artecdesign.ee/~jan/Kaamerad/PowerShotA70/38.jpg

Here is wehre it plugs into the power board.

http://www.artecdesign.ee/~jan/Kaamerad/PowerShotA70/20.jpg

[Christopher_P]

Thanks for that Bower.

I've got the 2 by the battery compartment, and the 2 inside it. The panel with the speaker/zoom control has now come off.

But I still can't seem to get back panel itself off. It's nice and loose all around the bottom, up the memory slot, and now where the backup battery is. But it still seems very tight along the top and next to the wheel. How much force do I need to apply to get the top edge off?

I've taken a total of 10 screws out now - am I missing any?

Much appreciated,
Chris

[BowerR64]

I think 10 screws is how many their are and then you have the little tabs at the top. If you havnt had it apart before these are tricky because you dont know they are there and wich way they work.

http://i5.photobucket.com/albums/y191/BowerR64/Camera/tabs.jpg

You just have to pull and twist till they pop lose.