Power LED on, water level not dropping or stopped dropping on brewing.

After opening the base cover, you can check the thermal cutoff fuse by measuring resistance between Neutral - the white wire from power plug and the contact at lower of water heater (which is behind the metal plate below the water heater connecting to Ground - green wire)

If the resistance level is indefinite (cutoff), this mean you have a brown fuse.

If Power LED cannot turn on, you might have problem with one of microswitch, water level sensor and jug position sensor. In this case, you might try to clean the microswitch with electronic contact cleaner.