How to install OpenWRT Chaos Calmer compliled image on Netgear r7500 router

Hi,

I'm trying to install openwrt chaos calmer which i compiled from source for Netgear R7500 router. Whenever i upgrade my router with this firmware image, the router doesn't boot up normally. ( power LED is orange)

Nothing comes on serial connected console as well.

i upgraded it with both the options using default web firmware upgrade option and tftp.

still no luck.

Any help is highly appreciated.

Thanks,

Bharat