This is the LED light circuit board that indicates the system's power, battery, and HDD status, compatible with the Dell Precision 7670, 7680, and 7780 Laptops.
Compatible Dell Laptops:
Precision 7770
Precision 7670
Precision 7680
Precision 7780
Dell Part Number: WDFJR
Alt Part Number's
HDC70
LS-L885P