Look carefully at the back of the PC, where the power lead enters the PC. There should be a small plate fixed to or printed on the PSU (Power Supply Unit), stating the allowable input voltage.
If it says something like 210~230V, forget it. If it says 110~230V, you should be fine.
If you can't see a marking, ring Evesham.
The loder PSUs had a switch that you set to either 110 or (then) 240V - most nowadays are auto-sensing.
Check your monitor carefully for the same type of information.