E3440 integrated webcam does'nt work

Hello, 

I have a question referring to the integrated webcam in my dell 3440 Laptop. The webcam doesn't work anymore, i didn't use it for a long time. I tried now the webcam with skype and the camera app of windows 10 (latest version, all drivers new; latest bios);in skype no picture / in the camera app just a flickering message "nocameraattached"; the LED beneath the webcam is also only "flickering". I tried a ubuntu Live System; the led beneath the camera is in this case on; but also no picture. The ePSA tool says camera o.k.??, the PC support tool does'nt complete the test of the webcam (windows 10). I've tried a lot of workouts (removing / reinstalling the camera; disable the usb ports /removing/reinstalling the usb drivers, using a system backup of february, reinstalling the chipset drivers) nothing works.

My questions are: Is it a hardware defect ? (for example broken camera / broken cable; may a not correct fixed cable) 2. I thought about flashing the bios as a try to fix the problem; but the newest bios is installed and the bios software will not reflash with the same version. Flashing the software of an older Bios version is not recommended.

Could it be a "hardware detect problem" during the boot process ?

Thanks for Your comments/ideas

Foerters

Update:

I did the ePSA Test once more; camera was dected as "new device" during the ePSA tool was running.

The SupportAssist Test runs about 47 minutes; then stopped with "not passed" at the RGB Pixeltest.