Hardware reset DVR H.264 + PCBOX

[purinqui]

Hi, i have the follow problem.
I've got the H.264 DVR PCBOX the model is: K-HU4D-A DVR + 4 Cams, and i forget the password.
I want to reset the password through hardware reset.
I was reading some articles about it, but almost board are different than mine.

Here i post some pictures about my board, in order to somebody help me, which is the chip resistor.

Front pic:

http://postimg.org/image/72o89zbfp/

Rear pic with exact model of DVR:

http://postimg.org/image/hwsmgynsl/

Board Pic 1:

http://postimg.org/image/xmmn78uyh/

Board Pic 2:

http://postimg.org/image/w41mzk5lv/

Board Pic 3:

http://postimg.org/image/4fbnvgs3p/

I can´t figure out the chip resistor for reset the password.
Please help me. I want to recover the pass and use my DVR, thank you very much.