Small and large cup lights won't stop flashing

1. Press the auto off and small cup at the same time. Then Immediately release and re-press the small cup three times.
When it works the only light showing will be the descale light.

2. Press the small cup button then auto off button then release small cup and then auto off, when this works the lights on will be the power button light and the descale light.

ALL OF THE ABOVE DURING THE PROCEDURE MUST BEEN DONE FAST OR RAPIDLY.

3. When both of the above lights are on,(power and descale), unplug for about 3 to 5 seconds... and plug back in. The brewer should come to life and work normally.

Below is the address and Phone number to Keurig warranty service.

Keurig, Incorporated
101 Edgewater Drive
Wakefield, MA 01880
1-866-901-BREW (2739)

https://www.philips.co.za/c-f/XC000004129/i-cannot-finish-the-descaling-procedure-of-my-saeco-exprelia

https://www.philips.ca/c-f/XC000005641/i-cannot-finish-descaling-my-saeco-xsmall-espresso-machine

In order to keep your Tassimo machine operational at full order, it is important to descale it every three months. Descaling products are widely available from stores that sell coffeemakers and espresso machines. Be sure that the product you buy to descale your Tassimo machine is intended for this specific use only. Mix the descaling product directly in the water container, following the instructions provided on the descaling packaging. Then replace the water container on the machine. Place a large cup or mug on the cup stand, insert the cleaning disc, bar code down and close the brew mechanism. As soon as the AUTO light illuminates, press and release the start/stop button. This will fill the brew cycle with descaling solution. Empty the cup and let the machine stand for 15 minutes. Then open the brew mechanism and close it again, leaving the cleaning disc in place. Repeat this step two more times for maximum descaling effectiveness.

Discard the remaining descaling agent from the water container, rinse it well and refill with fresh, cold water. Clean the machine by flushing water through it in the same manner and emptying the cup as it fills. Make sure that all the descaling solution has been completely rinsed away, and then flush two full water containers through the machine before using it again. Remove the cleaning disc, rinse and refill the water container and your Tassimo machine is ready to use. Also, before you descale your Tassimo machine, always unplug it. Also, never immerse the appliance in water and nor should you use abrasive cleaning products or scouring materials on any part of your Tassimo machine. This method works for most espresso machines, including some of these popular models: the DeLonghi Magnifica EAM3200S, DeLonghi Magnifica ESAM4200S, DeLonghi Perfecta ESAM5400, Gaggia 74507BCN Classic, Krups EA8080 Espresseria Automatic, DeLonghi PrimaDonna ESAM6600, the BC0255 DeLonghi coffee machine and the Krups Nespresso CititZ XN 7006.

After many months, I solved the problem of the red light staying on the Tassimo Coffee Maker. Use these easy steps.
1. Fill a 2 cup measuring cup with hot water.
2. Mix in descaler.
3. Pour in the empty water tank.
4. Put the yellow cleaning disk in the chamber and close chamber. Put the two cup measuring cup under the spout.
5. Push and hold the brew button for about 3 seconds (until the red and green light flash.
6. Now don't touch the machine. It will do it's thing for about 20 minutes. (Don't be impatient and start to push buttons, just leave it)
7. When it finishes it's cycle. The red light will turn off. Then clean the water tank and put fresh water and run clean water through the brewing cycle 4 times. Your machine is now ready for use.

Hi
If you are talking about the descale light, you must let the machine quit on its own. The pump has to stop on its own. Any interruption (you stopping the machine) will keep it in the descale mode. Once it stops on its own, the lights will change. Then do the rinse by replacing the water in the tank and closing and then reopening the steam knob and again letting the machine quit on its own. Again the lights will change. Then repeat the last cycle (putting water in the tank and closing and then reopening the steam knob)until all the red lights go away and you only have a green blinking light. Now your finished descaling a compact without a digital display.

Hi You have finished the first part of the descale process if that machine is like all the others. Rinse out your water tank and put fresh water in it. Then put it back on the machine and close then open the knob for steam and let it run the whole tank out. When it is finished the descale light will disappear and your green light will blink and the water light will be steady. Refill the water tank and close and then open the steam knob to prime so the water light will go out.

Hi
You have finished the descale process and your descale light should be gone. Put a fresh tank of water on the machine and then open the steam knob. This should clear the water light and your machine will start heating again.

I had the same issue. This is what a did:
Turn off the machine
Remove the tray/container and leave it outside
Turn on the machine and this time the power button should be flashing (preheating) then hold both cup buttons for 3 sec and it will be back to normal opertion....
For some reason the sensor needs to read that the tray/container is out of the machine...

I use distilled white vinegar, but you can use specialized coffee cleaners with this model:

Descaling
Descaling 11
Descale your Tassimo machine every three months to keep it
operating at full potential.
1 Descaling products are widely available from stores selling coffeemakers and espresso
machines. Only use a product intended for descaling. Mix the descaling product
directly in the water container, following the instructions provided on the descaling
packaging. Replace the water container on the machine.
2 Place a large cup or mug on the cup stand, insert the cleaning disc, bar code down,
and close the brew mechanism. When the AUTO light illuminates, press and release
the start/stop button. The brew cycle will fill the machine with descaling solution. Empty
the cup and let the machine stand for 15 minutes.
3 Open the brew mechanism and close it again, leaving the cleaning disc in place.
When the AUTO light illuminates, press and release the start/stop button. When the
machine stops running, empty the cup, and let the machine stand for 15 minutes.
Repeat this step two more times for maximum descaling effectiveness. Discard the
remaining descaling agent from the water container, rinse it thoroughly and refill
with fresh, cold water.
4 Open and close the brew mechanism again, leaving the cleaning disc in place.
When the AUTO light illuminates, press and hold the start/stop button to flush water
through the machine. The MANUAL light will flash. When the cup is full, release the
start/stop button, empty the cup, and replace it on the cup stand.
5 Repeat step 4, flushing clean water through the machine in the same manner and
emptying the cup as it fills. To ensure that all the descaling solution is completely rinsed
away, flush two full water containers through the machine before using it again.

The manual states that after you descale, you have to hold down the hot water button for 6 seconds, that will turn it off and "reset the timer" till the next time it needs to descale.