Intervalometre & bulb eos M

[TIbasic]

Hello ! I use my eos M to astrophotography, and I'd like to know if it's possible to turn off the screen while using the bulb timer & intervalometre ?

It makes noise on photo (I don't know how to say, look for bruit thermique on google... Sorry...).

Is it possible ?

Thanks !

EDIT I found...
But...

With bulb timer, the apn makes a dark (long exposure noise reduction) but this option is not enabled... Why ?

Edit 2 : Ok, I made a second test, I don't know why, the shutter stays close, but not as long as the exposure time...