Keurig B2000 only dispensing 1/8 cup of water

Question

Kcup holder and tip have all been cleaned and look to be in good shape. Push button with no k cup in to see if just hot water will come through. After pushing button it takes about 25 seconds for first drip of water to enter the cup. During this time the engine in the k cup area is straining and surging power (my lights dim sometimes). After 25 seconds- spurts of water come out but never a steady stream and in the end we have about 1/8 to 1/4 c. water in the cup (it is hot though)!! After trying this process for 3 or 4 times all the lights start to blink on the machine and you can not operate the machine again unless you turn if off then back on again. (Signal to me that something is not right.) All fuses look to be in good order and plugged in, no apparent damage from shipping or something that might have gotten loose. From the people I have had look at it they seem to think maybe the valve between the hot h2o tank and the k-cup is bad? We really do not know though.