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04-16-2017

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help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-16, 12:14 PM

my system software is win10 enterprise 64bit

all drivers has been installed...

but sytem cannot detect em7455 in device manager...!!

 

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12629 Posts

06-06-2011

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-16, 12:26 PM
Hello and welcome

Did you install modem on the photo yourself?



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-16, 12:30 PM

yes....

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04-16-2017

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-16, 12:52 PM

can u tell me why?

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-16, 14:56 PM

There is a lot of threads in the forum with the same issue.

Read the post below, there are questions and advices. Let me know about results.

https://forums.lenovo.com/t5/ThinkPad-X-Series-Laptops/X1-Yoga-Sierra-EM7455-SIM-Cards-Not-Being-Detected/m-p/3488778#M74188



x220 • Gobi 2000 3g | hdd, msata ssd, wwan, wifi, gps -- unique hand-made config
ThinkPad 25 Special Anniversary Edition. #Retro. Signed by D.Hill
T470p | X1 Carbon Gen3 | Miix 2 10" | Yoga Tablet 2-1050F (Android) + BT Keyboard
ThinkPad Stack • 2.4/5 Wireless Router, HDD 1 TB, BT Speaker, Power Bank, Mobile Projector

Do it well, worse becomes itself

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04-17-2017

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-17, 13:41 PM

 

as u said , i follow those instrodution:

1、Make sure the wwan adapter is enabled in the BIOS Setup: Security menu -> I/O Port Access

2、unplug the AC adapter and disable the laptop battery in the BIOS Setup,disable the battery, unplug the AC adapter, disassemble the laptop, remove the wwan card, wait a couple of minuts, assemble the parts, try to use the wwan card. 

no use...still cannot find em7455 in device manger..

 then i perform the UEFI/BIOS/EC reset: disable the battery, unplug the AC adapter, press and hold for 20...30 seconds the power button. Then load default UEFI BIOS settings.

no use ag..

at last i find sth in another forums, sb said  em7455  in x270 series 's  Official configuration change fru from "00JT547" to "01AX746" . my wwan em7455's fru is "00JT547" which used in x260 series ,so i suppose x270 mabe  incompatible this em7455 which fru is 00JT547。

is it true?

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04-17-2017

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-18, 15:10 PM

i met the same issue...just like this one..

https://forums.lenovo.com/t5/ThinkPad-T400-T500-and-newer-T/T470-WWAN-card/td-p/3631589

 

do what u said...no use

 

still cannot find em7455 in device manager....

 

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4924 Posts

04-25-2008

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-04-18, 16:32 PM

Hi weiwei, Please describe in detail your installation process, and the diagnostic steps you have been through. This will help the community help you!

I don't work for Lenovo. I'm a crazy volunteer!
Using Browser Search To Find Answers in the Lenovo and Moto Communities.
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06-02-2015

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-05-07, 14:00 PM

This modem ( if you not buy this from Lenovo official) not detected in laptop to BIOS level (vid - pid not recognized in white list). Lenovo integrate White list to BIOS - if you buy modem (or Wi-Fi) not from lenevo - you cant see this devise (not powered device).

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11-28-2007

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Re: help!!x270 (20HNCTO1WW) cannot recognize em7455 wwan card...

2017-06-20, 18:07 PM

The card in the picture is for X260 systems, not X270.

The card you need is FRU 01AX746.

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