Iphone 4s wifi chip gets very hot - GSM-Forum

okrongly · 05-01-2015, 11:56

Hello,
I have iphone 4s with very hot chip problem. I've changed already 2 new chips but still the same problem. Phone has apple logo loop (it's ok without chip)
Any ideas?
Thanks in advance

salahmohammad · 05-02-2015, 00:09

You have to make sure its sitting in the right spot exactly. make sure the solder isn't touching different connections.

okrongly · 05-02-2015, 09:42

No shorts between pads, chips are new, sitting perfectly

gengar · 07-29-2015, 12:40

I have similar problem with two 4s phones. I have soldered many wifi chips (new ones, used, original and from china) and sometimes there is nothing going on and sometimes it gets very very hot so I have to disconnect the battery quickly.

Now the question is: what is wrong? I have changed the coil, some important resistors etc but I think maybe the black resin is blocking the chip from sitting correctly in a place? I didn't clean it too much, because I did already two other phones in the same way and they're working perfect from the very first time.

I'm sure that it is problem with wifi chip, because before I desoldered it, I reheated the chip and wifi was working.

05-01-2015, 11:56	#1 (permalink)
okrongly Freak Poster Join Date: Nov 2006 Location: Ireland Posts: 196 Member: 397374 Status: Offline Thanks Meter: 26	Iphone 4s wifi chip gets very hot Hello, I have iphone 4s with very hot chip problem. I've changed already 2 new chips but still the same problem. Phone has apple logo loop (it's ok without chip) Any ideas? Thanks in advance

05-02-2015, 00:09	#2 (permalink)
salahmohammad Freak Poster Join Date: Apr 2015 Location: Jerusalem, Palestine Posts: 209 Member: 2386012 Status: Offline Thanks Meter: 94	You have to make sure its sitting in the right spot exactly. make sure the solder isn't touching different connections.

05-02-2015, 09:42	#3 (permalink)
okrongly Freak Poster Join Date: Nov 2006 Location: Ireland Posts: 196 Member: 397374 Status: Offline Thanks Meter: 26	No shorts between pads, chips are new, sitting perfectly

07-29-2015, 12:40	#4 (permalink)
gengar Junior Member Join Date: Mar 2008 Posts: 12 Member: 735198 Status: Offline Thanks Meter: 0	I have similar problem with two 4s phones. I have soldered many wifi chips (new ones, used, original and from china) and sometimes there is nothing going on and sometimes it gets very very hot so I have to disconnect the battery quickly. Now the question is: what is wrong? I have changed the coil, some important resistors etc but I think maybe the black resin is blocking the chip from sitting correctly in a place? I didn't clean it too much, because I did already two other phones in the same way and they're working perfect from the very first time. I'm sure that it is problem with wifi chip, because before I desoldered it, I reheated the chip and wifi was working.