Have you tried to restart only the management services?
/etc/init.d/hostd restart
/etc/init.d/vpxa restart
/etc/init.d/rhttpproxy restart
That's different from services.sh, which restart all services on the host.
Other tip is, press F12 in that blank screen and check if it shows any message during the inspecting element.
/etc/init.d/hostd restart