iPhone 7 error 4013 baseband shorted? - GSM-Forum

Burebista · 05-26-2018, 17:21

Hi guys,
I've received this phone with iTunes restore error 4013.
I've opened the phone and I start do some checks.
The problem seems to be from two lines: BBPMU_TO_PMU_AMUX1 and PP_1V0_LDO9
I removed all those caps and also I removed the modem power but still there
is short to GND.
Is the modem ic damaged? I don't see any other line conected with those two.
Thank you!

Burebista · 05-28-2018, 21:32

There is no need of any reply.
After I removed the bb chip, the short to GND is gone.
I've never saw an bb chip shorted to GND internally

)))

Alkra · 05-29-2018, 10:22

Hi, this is probably iphone model a1660, has a qualcomm bb chip, they often break. Apple recognized the problem with these chips.

Burebista · 05-29-2018, 10:54

Quote:

Originally Posted by Alkra

Hi, this is probably iphone model a1660, has a qualcomm bb chip, they often break. Apple recognized the problem with these chips.

Yes,
it's qcomm version.

Alkra · 05-29-2018, 11:19

They fall under the extended warranty of the Apple apple .com/support/iphone-7-no-service

Jack_OH · 09-11-2018, 18:39

i have an 1660 too, but i have PP_1V0_LDO9 and PP_1V0_SMPS5 shorted line.

same baseband cpu issue? also, it's trash.

05-26-2018, 17:21	#1 (permalink)
Burebista No Life Poster Join Date: Feb 2006 Location: In a point from Universe! Age: 40 Posts: 1,633 Member: 235325 Status: Offline Sonork: 100.1593552 Thanks Meter: 523	iPhone 7 error 4013 baseband shorted? Hi guys, I've received this phone with iTunes restore error 4013. I've opened the phone and I start do some checks. The problem seems to be from two lines: *BBPMU_TO_PMU_AMUX1* and *PP_1V0_LDO9* I removed all those caps and also I removed the modem power but still there is short to GND. Is the modem ic damaged? I don't see any other line conected with those two. Thank you!

05-28-2018, 21:32	#2 (permalink)
Burebista No Life Poster Join Date: Feb 2006 Location: In a point from Universe! Age: 40 Posts: 1,633 Member: 235325 Status: Offline Sonork: 100.1593552 Thanks Meter: 523	There is no need of any reply. After I removed the bb chip, the short to GND is gone. I've never saw an bb chip shorted to GND internally )))

05-29-2018, 10:22	#3 (permalink)
Alkra Junior Member Join Date: Oct 2016 Location: Kiev Posts: 4 Member: 2642259 Status: Offline Thanks Meter: 1	Hi, this is probably iphone model a1660, has a qualcomm bb chip, they often break. Apple recognized the problem with these chips.

05-29-2018, 11:19	#5 (permalink)
Alkra Junior Member Join Date: Oct 2016 Location: Kiev Posts: 4 Member: 2642259 Status: Offline Thanks Meter: 1	They fall under the extended warranty of the Apple apple .com/support/iphone-7-no-service

09-11-2018, 18:39	#6 (permalink)
Jack_OH No Life Poster Join Date: Mar 2007 Age: 39 Posts: 681 Member: 475448 Status: Offline Thanks Meter: 60	i have an 1660 too, but i have PP_1V0_LDO9 and PP_1V0_SMPS5 shorted line. same baseband cpu issue? also, it's trash.