This is the power button (on/off switch) circuit board and ribbon cable for the Dell Inspiron M5030 and N5030 Laptops / Notebooks.
See Picture.
Compatible Dell Laptops:
Inspiron N5030, M5030, N4020, N4030
DPart Number: 42WHX
Part Number's found on product:
50.4EM09.001 (101)
JH 20101125