Oh yes just spotted it, in green body.
the earlier model batteries had a fuse on the pcb i think.
Well that proves a point, that the main unit has failed, one to avoid in future !
Thanks for taking the time to reveal this, as it happens i have a dc34 with exactly same problem, i haven't got the right to crack it open yet but may do in the future. I purchased an aftermarket battery to try and still dead.
problem is with these units / batteries is any attempt to open up leaves them looking like they have been chewed by a wild dog. A lot of heat on the casings helps as well as plastic spudging tools.
I now refuse to take any dyson cordless on, unless it is reported working and just requires deep cleaning and filter.