Need Help With Kenwood Head Unit

[Minhtin]

Hey guys, I got a silly question. How do you reset the DDX7701hd? I need to update the firmware for my head unit and it keeps telling me to reset the unit after the patch is applied. I power down the unit by holding down the power button then I power it up again. However, the head unit isn't retaining the patch with this method.

The manual states that the reset button for my head unit is a button with a little red triangle power indicator on the lower left. When I try to press it, nothing happens. The reset button feels solid like its part of the head unit's frame. I have no prior Kenwood experience so I can't determine whether or not mine is defective. Thanks for the help.