N90 II - Firmware upgrade

[OXOR]

hi... i'm very new on the tablet/android world...
how can i compare firmware versions? on the n90 II tablet the firmware version id is very log and confuse...
how can i do firmware upgrade?What are the steps to follow to upgrade firmware?
tnks a lot

Note: i've a N90 II with that info:
Model: rk30sdk
Firmware ver.(tr976_rk610_rk903_ov2659_ov2659_rk30hdmi_otg@120709)_mc_cn@120709)_v404.11_tl12
need the kerner ver. and the compilation number?

 

[OXOR]

hi... soo the site where i buy the tablet sad that need update firmware ... i did, but now the tablet doesn't start... no signal off life...someone can help? tnks

 

[OXOR]

the tablet doesn't starthttp://www.************/song17.jpg

http://www.************/song2.jpghttp://www.************/song18.jpg

yes...no signal of life... nothing..., i already put the power charge, connect to the pc , wih nothing connected and the same , doesn't start, not even blinks