Did it drain as it could be a water pump issue? The water pumps do fail after long term use also buildup in the pumps (or a bra wire for example), can stop the pump working. It is also relatively easy to remove the pump to check its condition/remove buildup of materials and insert. (we have also had a bra wire stop the pump as well).
There are heaps of videos on Youtube showing how to remove water pumps to check them.
Also, does the drum rotate or does it rotate with a new noise? If it rotates with some force but has a terrible noise, could mean something is stuck in the base of the drum preventing it turning freely. If the drum can't turn freely with some effort, our Fisher & Paykel stops working and displays a fault.
30 years is an excellent life for a washing machine. The sort of life one only dreams of.