Issue with limit switch?

Hello all!
(i'll preface by saying when i refer to directions, its from facing the machines front)
last week my right-rear flanged bearing came apart and the machine started howling.
I replaced both flanged bearings ( x axis).
even though the Y axis made a grinding noise when it hit the rear left of the machine, the test print went fine.
I loaded up a print and the machine went through it's normal "leveling routine", but when it hits the rear-left, the grinding starts again (like it's attempting to continuously travel) and then i get an error message on the LCD that reads "ERROR DETECTED. Connection interrupted. please reset the connection to the printer controls. If error persists, please call customer service and report: probing failed"
Is this a limit switch problem creating the probing error?
If so, how do i adjust the limit switch (switch is good, i can manually trip it)?
If not, any ideas?

 

That sound like a starting point!
thank you, sir!