W810 cant be connected to Se tool

[ipbr21054a]

I have been given a w810.
I have a new battery which in my friends phone shows 100%.
If i try to turn on the phone nothing happens not even the red light in the infa red port ?
I have tried holding down the c button then identifyt & also 2+5 then identify but nothing.
I have had a read through but did not see anything that would help me.
Any other ideas what i can do so i can flash new firmware.

thanks