Best think is to get the unit serviced.

As per a recent post, there may be other things going on. I have seen a upper tweeter go frail on me. It may be the driver that has failed? Hard to say.

I tend to think if there is no sound anywhere or a red light - its the Eprom or chassis electronics. if everything else is working, it may be driver specific. 

Have you tried playing L/R test tones? 

See what the effect is.

10

I just tried playng those testtones. But its only when bass is punching the driver it makes those noises. I actually think its the driver too, but the speaker should lock down, when a driver is faulty. 

Lenny78 wrote:

I just tried playng those testtones. But its only when bass is punching the driver it makes those noises. I actually think its the driver too, but the speaker should lock down, when a driver is faulty. 

My experience of the upper tweeter says it can play when damaged but the noise. Good if it is just the driver. 

Beolab 5 doesn't have any sensor to detect mechanical failure of the driver, so it will keep playing even when rubbers or spider web are damaged...

But the speakers allways shuts down, to prevent the drivers, to get damagde.  I think there is a heat detector, but if this wasent caused by overheating that proberbly dont work, in this case. 

First, I would swap the ICE1000 power amplifiers and listen to which loudspeaker there is interference, so we can confirm the efficiency of the amplifier or not. I had a few cases of damaged resistors on the ICE board and there was interference. Recently, I had two cases of damage to the silicone spacer and the insulator of the power transistor on the ICE1000 and continuous electric arc to the heat sink, in addition, an error appeared:

OS_ERROR (0x0753)

Fault in the Operating System.

A software problem has occured (hardware is OK).

Remove the AC power from BeoLab 5 for at least 5 seconds to reset the microcomputer.

0x0E41 (0x0E41)

0x0E55 (0x0E55)

Despite the BL5 error, it works.

Sorry for my English.