Hi MTS1,
You only normally have the power light on the box on, indicating on or off or flashing when you press the remote keys.
Have you tried rebooting the box by turning the switch on the back of the box off and on again.
If that doesn't work then you could try a factory reset selecting the keep recordings option.
If that doesn't work and you need the light then you will have to call Virgin to report a fault, or wait here for one of the forum team to pick this up which might be 2 to 3 day's.
When phoning choose the option to report a fault, then ignore all the options offered and you should then be placed into a queue to speak to someone.