I own an VPCS136EC and has attempted numerous ways to reboot the system back to original setting. I have tried the ASSIST key but it kept saying something is wrong with the program and forces it to shut down. Then I tried F10 but it displayed the rebooting page but fails to launch the rebooting process.
If you are unable to access the recovery partition with F10 key during post, the usually indicates a problem with the software image or the hard drive. You could try a set of recovery media, but if that does not resolve then there is likely a hard drive failure.