  We consider no-scale inspired supergravity scenarios, where the gravitino
mass and related soft supersymmetry-breaking parameters are determined
dynamically by radiative corrections to an essentially flat tree-level
potential in the supersymmetry breaking hidden sector. We examine the
theoretical and phenomenological viability of such a mechanism, when including
up-to-date calculations of the low energy sparticle spectrum and taking into
account the latest LHC results and other experimental constraints. We
(re)emphasize the role of the scale-dependent vacuum energy contribution to the
effective potential, in obtaining realistic no-scale electroweak minima,
examining carefully the impact of boundary conditions and of variants of the
minimization procedure. We also discuss and implement the B_0 (soft breaking
Higgs mixing parameter) input boundary condition at high scale, therefore
fixing tan beta(B_0) at low scales. For general high scale boundary conditions
with non-vanishing B_0, m_0..., our analysis provides theoretical correlations
among the supersymmetric, soft and vacuum energy parameters and related
phenomenological consequences at the LHC. For instance, a zero vacuum energy at
the GUT scale would lead to a decoupled supersymmetric spectrum, together with
a light standard model-like Higgs boson at the electroweak scale. Given the
experimental exclusion limits, a substantial class of the boundary conditions,
and in particular the strict no-scale with m_0=A_0=B_0=0, are only compatible
with a stau being the lightest MSSM particle. Then an enlarged allowed
parameter space emerges when assuming a gravitino LSP to account for the
observed dark matter relic density.
