Filter DataFrame plus show me data where you can not filter

Question

imagin i have this Dataframe,

      MNR  MINM_x  MINM_y
0   62614     7.0    10.0
1   62614     7.0    20.0
2   62614     7.0    30.0
3  67624B     1.0     1.0
4  67624B     1.0    10.0

Now i want to filter where MINM_x == MINM_x so i did this

df_innerfinal1 =df_innerfinal[df_innerfinal.MINM_x == df_innerfinal.MINM_y]

the result is now this

      MNR  MINM_x  MINM_y
3  67624B     1.0     1.0

but i want this

so if there is no posibilty to filter on MNR Show me the data where you can not filter

      MNR  MINM_x  MINM_y
0   62614     7.0    10.0
1   62614     7.0    20.0
2   62614     7.0    30.0
3  67624B     1.0     1.0

have you any ideas???

Thanks a lot !