Sleep/Wake Button Doesn't turn off phone - Liquid Damage
My friend's iphone 3gs was dropped into a glass of juice due to a vibrating alarm.
It has the basic hallmarks of other liquid-damaged phones: no backlight, otherwise functional, except for the sleep/wake power button.
Thanks to the guides here on ifixit, I've taken the phone down to the rear-chassis, replaced the screen with a new one purchased here (to support the great service provided), taken the physical button out and checked for damage, looked at the circuits and connectors, and I still have the same problems.
So two issues, then:
1) Power button - The button clicks and physically appears functional. The headphone jack, volume up and down, and mute selector switch all work great. It doesn't seem that I would need to purchase a new ribbon cable/circuit of all those if just the sleep/wake functionality is not working. Anyone have a more detailed pinout of this circuit? Also, I saw something online where someone suggested loosening the screws holding the ribbon cable in, but didn't see that it was listed as an accepted solution.
2)No Backlight - despite a thorough cleaning with a toothbrush and 91% rubbing alcohol, and replacement with a new screen, I still don't have the backlight working. I've purchased the 6r8 coil listed in a lot of online discussions about this problem, and am ready to work on replacing that on the logic board itself if I can't resolve it otherwise.
It's possible that the connectors for these circuits have some damaged pins from the water damage and cleaning. (either the male or female connector.) The display suffered a lot of damage while vibrating in the juice. the solder on the logic board connector was gone on 3 leads, and one lead was bent over to another leads trace. I was able to repair that with the help of a scope, but I'm now back to square one. I'll do a more thorough cleaning and inspection of the connectors soon, but if you have any ideas, please share
Is this a good question?