CF 20 WWAN problem

The Sierra aircard in my CF 20 suddenly stopped working in the middle of a session.
Now it is not even in device manager (also no unknown devices)
I pulled out the card and re seated it to no avail.

Any one a idea ?

 

First idea - check whether cellular/WWAN is enabled in Windows/BIOS.
Second idea - power pull reset
1. Pull battery.
2. Disconnect power supply.
3. Hold power switch on for 20 seconds with one hand while holding someone's tits with another hand.
4. Plug in power supply, battery. Check if it works now.
(it's copy-pasted from one of this forum threads, but includes my own lifehack)

 

Windows 10 has a habit of doing this with hardware, if you had an update roll back to see if it works before the update.

 

@BaRRmaley will try that without the second part of 3

@Michael AU No update was done as it is blocked when working on WWAN for paying reasons, it just stopped working while surfing the net (also no viruses if you thinking about that)














9

 

I also had issues with devices such as the touchpad and the wwan card that would stop working and this resolved it (as i have a cf-20 with an em7455), you need to go in device manager and turn off the power saving features of the usb hub(i did for both usb2 and usb3).
You can also try to upgrade the firmware, i used the latest one from here;
https://techship.com/downloads/category/firmware-firmware-sierra-wireless-sierra-wireless-em7455/

Also some drivers are more stable than others, i would try different/newer ones.

 

I have the EM7305 (European version)
Power saving is already off (from a earlier problem with the usb in the keyboard dock)
I cant upgrade firmware or drivers if Windows does not even see the card !

 

Uninstall the drivers and try the panasonic or generic sierra ones(they behaved differently for my em7455) and when it wakes up try to upgrade the firmware.

https://techship.com/downloads/category/firmware-firmware-sierra-wireless-em7305/

If it still does not work then i would try to use Ubuntu on a usb drive to see if it is still working at all.

 

You have to strictly follow the instructions.

 

SOLVED !

I did the trick from BaRRmaley (Without that special part), but had still no WWAN in the statusbar, but i now had the usb mobile device in device manager witch was disabled. Enabled it and it worked.
Very strange ! i don't know why windows suddenly cut some devices out of the blue.

 

I don't think it was Windows.
Maybe WWAN module has tried to get too much power and was disabled by hardware (like fuse). Need to consult with my engineer

 

Windows is a shocker for stuff like this, my mother's laptop had a fully functional DVD drive and Windows 10 installed an update and all of a sudden it doesn't recognise the DVD drive. Go back and install Windows 7 driver exe and the drive is recognised, Windows updates again and it's gone. I'm well aware I'm the odd one out letting Windows update but it's not my machine so I don't make the decisions about it.

 

As i said, there where no updates, so i still don't know why it suddenly stopped working.
The laptop was connected to the wall, so energy is at full power, all the usb power savings are disabled.
I think its a intermittent hardware fault as the usb (trackpad included) on the keyboard dock also stops working from time to time.
To prevent this error i re seated every flat cable in the dock and in the tablet, but that did not cover the fault.
Its very strange, sometimes it works well for several days, other times it manifests after some minutes.
Take the battery out in the tablet and re insert it, and it works again.

 

Every discussion here ends with "Win10 must die". Win10 haters )
Don't you want to use your warranty?

 

No warranty, bought it second hand 8 K hours on the counter.
CF 20 is definitively not as tough as a CF 19

Btw, i am not a Win 10 hater, i love it, but it has its faults, just like Apple OS and Linux, you have to live with it.

 

I thought all Toughbooks have 5 years warranty. Maybe there is a sense to check it and replace this CF-20 with a bugs free one )

 

There is a 5 year warranty if you have the original proof and bill of the purchase witch i don't have.
Anyway, it is usable as the tablet has no faults, only with the keyboard dock attached.
Things that work then are keyboard, extra battery, SD card, lan, vga and hdmi.
Usb (on the dock) and touchpad work until they stop and i have to pull out the battery.