wifi greyed out, freezer works, replaced wifi antenna but nothing
i have had loads of problems with my 4s, to cut a long story short now the only problem is the wifi. The bluetooth works, when i put the phone in the freezer the wifi works for a number of hours, am i correct in that this could mean fractures in the chip or card? the phone was origionally water damaged.
i replaced the wifi antenna but that didnt change anything. i have read about reflowing? could this be an option and how do i do it (where is the wifi chip). any help would be greatly appreciated. would i be easier to take it to a shop or will i be ripped off? i did take it to apple to get an out of warrenty replacement but they wouldnt as the warrenty sticker had gone
Josh, it is most likely that you have micro-fractures on your board, possibly in the Wifi circuit. when you place your phone in the freezer, these fractures are closed by the contracting metal. Once it heats up, the fractures appears again and the component loses contact. A reflow may work, but check all your connectors as well as components first. Look for the obvious, like burned, charred, corroded or missing components. Keep in mind that placing you device in the freezer and then getting it out and warmed up will also create humidity and may cause corrosion on your logic board. Replace the antenna, check the "blue" coil and see what you get. Hope this helps, good luck
This answer was originally to another question.