hum in the transformer

[Arnau Pell]

greetings to all colleagues!
I have not specified the brand/model of the projector because surely it can happen in all of them.
The fact is that my Beaulieu 708el for a month began to make an electrical hum in the transformer when it takes a while (approx 45-60 minutes) of projection. The soft "electric hiss" is appreciated when it is turned on but not playing (for example when you have finished watching a movie).
Can it be a warning / symptom that something bad is going to happen?

PS: I use the google translator, sorry if there are things that are not well understood!

[John Burgess]

Hi Arnau
Providing your projector is running ok you have nothing to worry about. Transformers do hum it is normal, however you could check the fasteners holding the transformer down , if they are slightly loose the hum will be more pronounced. I am sure other members will add more information to your post.
John

[Arnau Pell]

Thanks John