Service Manual for Nspire N1592? (Not starting)

Hi,

I have a 5-year old Nspire N1592 laptop, which won’t start. Fan starts momentarily then dead. Tried with/without battery and with a different power supply.

I’ve looked on the Forums for manuals but this model isn’t listed. Is there a service manual? Or for a similar model? Any pointers?

Many thanks,
Michael