Help: Buzzing flipper coil

[PinPal]

My Black Knight has developed a buzzing flipper coil when its energized, I have adjusted the EOS switch but that doesn’t help. I only recently replaced the EOS switch as the old one was pitted. I had no trouble with it after that but it’s only in the last couple of days I have played it that the coil buzzes when its energized.  Would a new coil help this problem??
Eney help be appreciated...

[Strangeways]

Try simple things first - are the screws on the coil stop tight ?

Is the coil stop and / or plunger worn ?

Good solder connections on the coil / EOS ?

[PinPal]

will check, thanks....

[PinPal]

Buzzing stoped, I took the coil out and changed the coil sleeve, replaced the EOS switch and soldered all the lugs,,,  
The coil stops where ok and the plunger to...
Have changed plenty of coils before but this time for sum reason I put one of wires about face and blew the 15amp flipper power fuse    Dam..
And just check where those hot solder blobs go, I had one fall on a GE47 globe and it shorted so It was lit all the time    (interesting)
Two of the coils look a bit tired so I will order sum new ones from Mark.C
I allso found it needs two new flipper linkadg on the top set so will get thoes to.

[Strangeways]

Good stuff  Nothing better than being able to maintain your pinball machine !