XPS 8930, DW1810/QCA9377 WiFi Bluetooth failure, replacement recommendation?

Changed the battery(s) in the Bluetooth mouse lately?

Can you try pairing this BT mouse with a different PC to rule out a mouse failure vs a BT card failure?

Try this first:

Power PC off and unplug power cord from rear of PC. Then press/hold PC's power button for ~30 sec. Reconnect power cord to rear of PC and boot. See if BT mouse works now.

If BT not still not working, connect either a wired USB mouse or a wireless one with its own UBS dongle.  Open Device Manager.  Is Bluetooth listed? If listed, double-click it and see if Qualcomm BT card is listed correctly and marked as enabled, or if it shows any errors.

If not listed or doesn't have any error messages, expand Network Adapters and see if the Qualcomm Wireless Adapter is listed correctly.

Then click View>Show hidden on toolbar. Now look everywhere in Device Manager for any "unknown" device(s).  If you find any, right-click and uninstall them. Then click Action>Scan for hardware changes and see if Bluetooth appears on the list in Device Manager and shows the Qualcomm card correctly.  Now see if the BT mouse works again. If still not working, do you need to re-install the mouse's own BT driver on the PC? And confirm that BT is turned on and try pairing the BT mouse with the PC again too...

Do you use BT for any devices aside from the mouse, eg, speakers, headphones etc? If not, do you really need a BT mouse? You could just get a wireless mouse with its own USB dongle and not bother installing a new WiFi+BT card or just a BT card.  You don't have to get an identical replacement WiFi+BT Qualcomm card. 

Ron -- Thank you.  I've seen many of your thoughtful posts and I, for one, appreciate your help and advice. I suspect many others do too. 

I have followed the steps outlined in the 1st 4 paragraphs without success. I was only able to restore BT entries in Device Manager one time and when checking the properties of those entries, they all indicated that the hardware was not found. And, the Unknown Device entry refuses to clear, so I think the card is fried.

The mouse appears fine -- when in paring mode it does appear as an item on my phone's BT list.

Point taken - I really don't need to use a BT mouse, but the wireless accessories work well with the pull-out tray of my computer desk as the wires just get in the way.

The same Qualcomm card is available for $10, so I may try replacing it after tax season - just for practice. 

Many thanks, 

Rob

USB BT dongle is also an option if interested.

@krclucas - You're welcome.

Are you saying you can't right-click and uninstall the Unknown device listed in Device Manager?  Or you can uninstall it but it re-appears when you scan for new hardware?

If you want to try something else...

1. At desktop, open a CMD prompt window, Run as administrator
2. At the prompt, type in: chkdsk c: /r and press Enter. Accept offer to run chkdsk at next boot and reboot. chkdsk will run before Windows loads so be patient. When PC is back at desktop, open the chkdsk log to see if there are any "unfixed" errors.
3. Assuming no unfixed chkdsk errors, open CMD again, as in #1
4. At the prompt, type in: DISM.exe /Online /Cleanup-image /Restorehealth and press Enter. Be sure to include a space in front of each / and note any error messages when that's done.
5.  Assuming no unfixed errors in #4, at the CMD prompt, type in: sfc /scannow and press Enter. Be sure to include a space in front of the / and note any errors when that's done.

Assuming no "unfixed" errors in any of above, reboot PC and test BT mouse again.

Not sure I understand the comment about PC desk drawers. A wireless mouse's dongle plugs directly into a USB2 port on back of PC. That's all you need, and there aren't any wires to get in the way. 

@RoHe - Sorry was away for a bit.  Just confirming, I can right-click and remove the Unknown device. Upon rescanning for new hardware, it does find a new device but reappears and Unknown once again.  It seems to me that the card has failed in its ability to enumerate correctly so Windows can no longer identify the card. BTW, I reapplied the Dell driver package but it had no effect. 

Now that taxes are filed, I will have the time to try the next steps you suggest above. I will let you know the outcome. I also acquired a replacement card and failing the suggested steps, I will swap it in and to if Windows can see the replacement.

Many thanks.

Please keep us posted on the outcome, either a software and/or hardware fix.

That info could be useful to others having similar problems...

Ron,

I followed your instructions and uninstalled the device.  After a shutdown and cold startup, the unknown device was gone.  The only thing I can think of is some device glitch caused by the failed Bluetooth / WIFI card that failed to clear after the new card was installed.  In any case, the problem was solved. Thank you for the problem-solving steps.

Best regards, 

Rob