While this blog is dedicated to mobile electronics repair, especially water damage, I feel like I haven't done a whole lot in regard to actually teaching much (with the exception of yackin' about ultrasonic cleaning), so tonight, I'll throw out a trouble-shooting morsel (just one... for now... it's 3:30am, and I've got to sleep too you know). This 5S came in from another repair shop. It was water damaged and the other repair shop did a great job cleaning it up - yet the phone was still dead. I de-soldered the board shields (a must IMO if you want to be serious about restoring wet phones) and discovered evidence of corrosion that survived the first cleaning. The board was run through 4 cycles of 4 minutes each in my ultrasonic cleaner - changing the board position each time, then rinsed and dried. The board was placed in a frame (not it's original frame) that I've got set up with known, working parts (dock, buttons, battery). The phone powered on, but there was a problem. The backlight wasn't working! I could see the Apple logo, but only under a bright light. Powering it down, I pulled the board and placed it under a microscope to re-check the backlight circuit. Below is a photo of part of that circuit taken through the microscope. The green arrow is pointing at one of the backlight filters. Using a multimeter set to beep when a closed circuit is detected, I probed the leads from the LCD connector to the backlight filters and didn't get a beep on one of them. The circuit is shown by the red line - the LCD connector pin to the left side of that filter (FL24) should beep (closed circuit), but it didn't, meaning the circuit was open. Probing the other side of the filter, it beeps, thus the filter can now be assumed to be the problem. The filter was replaced and the circuit re-probed. It beeped on both ends of the filter, so the circuit is no longer open.
After reassembling the phone, a bright white light emanated from the LCD with a black Apple logo! The backlight was back! The board shields were tacked back on, the phone reassembled, and re-tested. The phone fired right up again. That's always a good feeling. :)
#1 Blogging to inform the masses of the silliness that is: "put your wet phone in rice". Rice cannot save your phone; follow the blog to find out why. If you feel like rice saved your phone, you got lucky. Nothing more. Nothing less.
#2 To offer high quality repair services, phone, and of course, rice accessories at a great price. Be sure to visit the store. New products and services are continually being added, so check back often.