What fuse
Most tanks and cisterns are pressure fed, well they are in UK. Check and change the header tank inlet valve washer or the whole unit. The only other thing is you have a macerator toilet which is electrical so you need to get an electrician in to ascertain if the fault is electric.
Bob UK, September 2013
What's connection ,header tank ,fuse and power ,toilet not flushing ,change ball valve on tank that s not water on tank