Re: Tank not filling
It sounds like there may be some debris caught in the toilet line. Turn off the water, disconnect the supply line to the toilet and put the end into a bucket, then turn the angle stop back on. If you have good pressure here, then the obstruction may be in side the toilet tank refill mechanism.
Without water running, turning on/off the supply line in the kitchen should have no bearing on whether the toilet tank in the basement fills or not. IF the kitchen water was running at the time, it could result in reduced pressure to the basement and that may affect the filling of the toilet.
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