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Deze versie is geschreven door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!

A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.

It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed  ‘Macs Fan control’  and turn down the speed. The noise didn’t go away/decrease.

When I decrease the screen brightness to almost 0 then the noise is almost gone.

What could it be?

Thanks!

=== Update (03/04/2021) ===

Hi all,

I didn't repair the Mac. All functions were working, noise didn't get louder so I went with it.

After working on the Mac I shut it down and after 45 minutes I want to start working again…The Mac did not start up. Nothing, no noise, connection, screen. Also disconnected power cord.

What to do? Replacement of PSU?

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676352

Bewerkt door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!

A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.

It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed  ‘Macs Fan control’  and turn down the speed. The noise didn’t go away/decrease.

When I decrease the screen brightness to almost 0 then the noise is almost gone.

What could it be?

Thanks!

=== Update (03/04/2021) ===

Hi all,

I didn't repair the Mac. All functions were working, noise didn't get louder so I went with it.

After working on the Mac I shut it down and after 45 minutes I want to start working again…The Mac did not start up. Nothing, no noise, connection, screen. Also disconnected power cord.

What to do? Replacement of PSU?

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676352

Bewerkt door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!
 
A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.
 
It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed ‘Macs Fan control’ and turn down the speed. The noise didn’t go away/decrease.
 
When I decrease the screen brightness to almost 0 then the noise is almost gone.
 
What could it be?
 
Thanks!
 
=== Update (03/04/2021) ===
 
Hi all,
 
I didn't repair the Mac. All functions were working, noise didn't get louder so I went with it.
 
After working on the Mac I shut it down and after 45 minutes I want to start working again…The Mac did not start up. Nothing, no noise, connection, screen. Also disconnected power cord.
 
What to do? Replacement of PSU?

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676376

Bewerkt door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!
 
A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.
 
It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed ‘Macs Fan control’ and turn down the speed. The noise didn’t go away/decrease.
 
When I decrease the screen brightness to almost 0 then the noise is almost gone.
 
What could it be?
 
Thanks!
 
=== Update (03/04/2021) ===
Hi all,
 
I didn't repair the Mac. All functions were working, noise didn't get louder so I went with it.
 
After working on the Mac I shut it down and after 45 minutes I want to start working again…The Mac did not start up. Nothing, no noise, connection, screen. Also disconnected power cord.
 
What to do? Replacement of PSU?

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676376

Bewerkt door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!

A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.

It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed  ‘Macs Fan control’  and turn down the speed. The noise didn’t go away/decrease.

When I decrease the screen brightness to almost 0 then the noise is almost gone.

What could it be?

Thanks!

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676376

Bewerkt door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!

A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.

It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed  ‘Macs Fan control’  and turn down the speed. The noise didn’t go away/decrease.

When I decrease the screen brightness to almost 0 then the noise is almost gone.

What could it be?

Thanks!

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676352

Bewerkt door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!

A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.

It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed  ‘Macs Fan control’  and turn down the speed. The noise didn’t go away/decrease.

When I decrease the screen brightness to almost 0 then the noise is almost gone.

What could it be?

Thanks!

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open

Goedgekeurd antwoord:

676352

Origineel bericht door: Rob Smeets ,

Titel:

Buzzing noise, turns louder when brightness is up

Tekst:

Hi all!

A couple of months ago I upgrades my iMac 2017, 21,5” model with a SSD and RAM.

It worked perfect. I was running BigSur. After the BigSur update from 11.0 to 11.1 I’m hearing a buzzing noise. I first I tought it was the fan, but I dont think so. I installed  ‘Macs Fan control’  and turn down the speed. The noise didn’t go away/decrease.

When I decrease the screen brightness to almost 0 then the noise is almost gone.

What could it be?

Thanks!

Apparaat:

iMac Intel 21.5" EMC 3068

Status:

open