After encountering error E9 (a problem with the locking mechanism) on my Beko washing machine, I replaced the locking mechanism, but the error persisted. Upon further investigation, I concluded that the issue was with the main control board. After removing the board and conducting a visual inspection, I discovered charred components. I ordered a new T2 transistor and new R21 and R50 resistors. After replacing the locking mechanism and the components on the board, the machine is working like new again.
The Beko washing machine error E9 is commonly associated with issues in the door lock mechanism. If replacing the door lock doesn't resolve the problem, it might be necessary to inspect the main control board for any damaged or burnt components. In my case, replacing the faulty T2 transistor and the R21 and R50 resistors on the control board fixed the issue. Now, the washing machine operates smoothly without any errors.