  We give a new approach to prove the existence of a weak solution of \[dx_t =
f(t,x_t)dt + g(t)dB^H_t\] where $B^H_t$ is a fractional Brownian motion with
values in a separable Hilbert space for suitable functions $f$ and $g$. Our
idea is to use the implicit function theorem and the scaling property of the
fractional Brownian motion in order to obtain a weak solution for this
equation.
