  We investigate the possibility of TeV-scale scalars as low energy remnants
arising in the non-supersymmetric $\mathrm{SO}(10)$ grand unification framework
where the field content is minimal. We consider a scenario where the
$\mathrm{SO}(10)$ gauge symmetry is broken into the gauge symmetry of the
Standard Model (SM) through multiple stages of symmetry breaking, and a colored
and hypercharged scalar $\chi$ picks a TeV-scale mass in the process. The last
stage of the symmetry breaking occurs at the TeV scale where the left-right
symmetry, i.e. $\mathrm{SU}(2)_L\otimes \mathrm{SU}(2)_R\otimes
\mathrm{U}(1)_{B-L}\otimes \mathrm{SU}(3)_C$, is broken into that of the SM by
a singlet scalar field $\mathcal{S}$ of mass $M_{\mathcal{S}}\sim 1$ TeV, which
is a component of an $\mathrm{SU}(2)_R$-triplet scalar field, acquiring a
TeV-scale vacuum expectation value. For the LHC phenomenology, we consider a
scenario where $\mathcal{S}$ is produced via gluon-gluon fusion through loop
interactions with $\chi$ and also decays to a pair of SM gauge bosons through
$\chi$ in the loop. We find that the parameter space is heavily constrained
from the latest LHC data. We use a multivariate analysis to estimate the LHC
discovery reach of $\mathcal{S}$ into the diphoton channel.
