Reply from another user on the Dell forums:

After researching this Bluetooth issue further, I learned that Dell did not necessarily install the Bluetooth module on all E6420 laptops. I didn't see the option shown on the online build sheet (hard to believe they didn't have Bluetooth by default).

I obtained the hardware via ebay and installed it (not plug-n-play nor for the computer hardware challenged, but possible if you're willing to take your laptop apart). Afterward, the Bluetooth then worked fine as it should. Again, why would Dell not make this Bluetooth standard rather than trying to save a couple of cents and cause such a headache for users?

My opinion: Dell has done this to save some money on the hardware and thus earn a few more bucks.

The DW380 (Bluetooth/WLAN) is validated on the Latitude E6420 XFR.

Once installed, test this DW380 Windows 10 driver.

thank you for the reply. I think that this laptop was from a large corporate purchase and could be that the bluetooth was deleted to save cost or for information security. Same applies to the fact that there is also no camera installed.

once i find a bluetooth module i will attempt to install it and new drivers for Win10. i did install more more ram so i know how tightly packaged everything is "under the hood" on this machine. 

thank you for the reply I will try the DW380 module and let you know how it goes.

Welcome to the Dell Community @Deercreek541 

I have an E6420XFR that I am working on.

In the manual it only shows where the Bluetooth cable is connected..

On the unit I am working on it does not have that connector.

Does yours have the connector???

If not then us an Intel 6235 combo card.

Best regards,

U2

NOTE:

The E6420 XFR is upgradeable to 16GB memory.

And I use i7-2640M 2.8MHz for the CPU.

i will have to double check for connection. xfr model doesnt just open and close so i was waiting to open it up again. 

i went with 8GB ram so i could keep the 4GB stick that was in it already.

 thank you for the heads up.

@Deercreek541 

I have 1000+ of the E6420 XFR's.

I refurbish 5-10 a week.

And yes I know every screw it takes to remove that base.

While I'm working on the laptop I will only secure 4 screws on the corners and the captive screw.

Just one question, do you live in the US???

Regards,

U2

no Canada i live near Toronto. What makes you ask?

@Deercreek541 

I have shipped upgrade kits for free in the past.

But the shipping costs out of the US, most of the times cost more than if the parts were just purchased in country.

Canada not to sure what it would be???

I would have to check next week.

Regards,

U2

ok thanks. i have a 380 module coming hopefully midweek and im having overheating issues so i will install module when i get it and redo heatsink while im under the hood. ive seen that the xfr runs hot normally but it shouldnt shut down like it does so im hoping fresh compound will cool it off enough. What area of the country are you in if you dont mind me asking?