My Saeco Vienna Digital enters a cycle, grinds coffee, apparently tamps it, and dumps the grounds into the recepticle..... but no liquid comes out. There is plenty of water in the resevoir. If I take the brew group out and rinse it, the process works for a few cycles, and then stops again. Can I clean beyond rinsing the brew group? Thanks.

Your machine needs dealer service. Either the brew group needs replacing or all the O-rings need replacing. The reason the grounds are wet is because water is forcing by the worn seals. These machines need dealer service every 6 to 9 months, and of course they don't tell you that when you buy them.

https://www.google.com/search?q=Saeco+Vienna+Machine+watery+pucks

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This needs looking at by a Saeco repair shop - the brew unit travels in a distinct 'pathway' from being empty, to filled, to coffee being tamped, then to being emptied. Yours is obviously not working as intended.
It may be the brew unit needs lubricating ( NOT OIL) or it may be the gear system that drives the brew units movements that needs attention.
Cheers
Mike.

Try using a lower volumne setting as adjusted on the front of the machine.

theres a micro switch that gets tripped when theres enough coffee which activateds the dump selinoid

It could be the grind on the coffee or the red group o-ring and the 2 o-rings on the white plastic valve need to be replaced.

Remove the brew unit and check for blockage in the shower screen, then try to brew coffee if same result machine might need to be descaled.

This happens due to condensation caused by steam developed at the end of the grinding cycle. Make sure that the grinding chamber is completely cleaned and dried before using the grinder.

1. Turn the whole bean chamber to the right until it can be lifted off the base. This will allow you to clean the grinding wheel. NOTE: Never use water or liquid for cleaning the lower grinding section of this appliance.
2. Clean interior recesses with a soft brush (not provided).
3. Wash the whole bean chamber and lid and the ground coffee chamber and lid in mild detergent and water. These items are only dishwasher safe on the top rack of your dishwasher. Wipe exterior with a damp cloth. Do not immerse mill in water or any other liquid or place in dishwasher. Use only non-abrasive cleaners to remove stains.
4. After completely drying, replace whole bean chamber. Important: when replacing whole bean chamber, screw on completely before setting grinding rate. Turn chamber clockwise (as viewed from top), until it will not turn. Fill with whole coffee beans for grinding and replace lid.
5. Replace ground coffee chamber and lid, making sure it snaps securely into place.

Hi
If you have the Delux or Digital there are 2 knobs in the bean hopper. Turn the small knob back 1 mark and see if that will help.

Clean the ball and valve assembly located in the Brew Group. It ocassionally gets "dirty" and needs cleaning. Be careful you don't lose the glass ball which is very small. Use a q-tip or small wire for cleaning the tubular area.

adjust the water flow look for a knob that turn right to left minus less water plus more water