Help finding pin 1 of the jtag connector inside the DM800HD PVR Clone

[The SIE]

HI ,
i found my 2 years ago bricked dm800hd pvr clone with the CA ERROR!
So i took it a part with the idea to jtag it.
This becuz all other tricks didn't workout : updates with webinterface not possible, nullmodem cable with dreamup, optiflasher pro and NCF Sim2 also.
rs232 cable not working . And last but not least .The leds on the ethernet connector green and yellow both are on when i put power in the box.
Now what i need to know is :

1- the location of pin 1 on the tjag connector located behind the ethenet connector
2-what program to use for flashing thru Lpt:
3-can i flash a complete image.nfi ? cuz second_stage bootloader is not enough becuz of the defective ethernet connection ?
-or will it come to live when second_stage bootloader is flashed ?
4 and is this the right format for flashing ?

It's quitte a list but the priority goes out to the pinout of the jtag connector.

Thx in advance.