Sago Palm - Dead?

Hi,
I have what I think is a Sago Palm that did quite well for a time but then all the fronds went yellow etc.

The spikey seed is still firm not soft so I don't think it has rotted.

Any ideas if it will come away again or any ideas of how to get it to sprout again?

I think it may not have been getting enough light.

What about fertiliser? What type and how often.

I'm not very green fingered but I do try.

Cheers,
Gaz

 

Yes a bit tricky this, how cold has it got?

They can also go yellow at low temperatures, but usually minus ones.
My money would be on what Marley says, its roots are rotting, or it could possibly be vine weevil.

They have a habit of coming back from what appears to be a dead state, so dont give up on it for at least a year.
As Marley says, they do nothing quick, and just look sad for ages then suddenly form a new flush of fronds in a matter of weeks.