Update

I managed the operation 🙌

⟐ Edited by author April 03, 2026 at 1:24 MST

⟐ Commented April 01, 2026 at 14:35 MST

⟐ Commented March 28, 2026 at 13:51 MST

Any advice?

⟐ Edited March 28, 2026 at 0:25 MST

⟐ Answered March 25, 2026 at 0:54 MST

I've been using my Mackie CR3 monitors with my Mac with no trouble for about 2 years now. Suddenly when I turned on the computer today I realized that no audio is coming out of the monitors.

The monitors are powered on (the green light surrounding the volume knob is on.) And strangely, when I connect a pair of headphones to the Aux out port in front of the active monitor, I can hear well through the headphones.

Does anyone know a fix for this?

Thanks in advance for your help.

⟐ Commented March 19, 2026 at 15:49 MST

⟐ Answered March 16, 2026 at 19:11 MST

⟐ Commented March 11, 2026 at 2:25 MST

⟐ Answered March 08, 2026 at 17:58 MST

⟐ Commented March 08, 2026 at 4:12 MST

I have a 2yr old JBL Bar 2.1 Mk2. It stopped working about 2-3 months ago and I've opened it up now to try to see what could be the problem.

When playing any audio from any source, it creates a very loud screech sound from the speakers.

It is only present when audio is being played, it gets louder if volume is increased but if nothing is being played and volume is at 100, no screeching sound is there.

System sounds like bluetooth connected tune also make the same screeching noise.

Today I opened it up, there's a Switch Mode power supply and it connects to the main audio board with one pair of wires. This runs at 23V.

Then at the audio board, there are four big ICs only

1. ES8680FSB (DAC?)
2. EP92A2S4 (HDMI Arc)
3. 2x Realtek ALC1322 with heatsinks on both (class d amp and codec?)

I thought there would be some dedicated IC for the class d amp but there's nothing obvious on either side of the board and only those two chips have a heatsink on them.

I've added a pic of the audio board. There's some white goo on the ALC 1322 chips from the heatsink.

The notable SMD parts

1. 8 inductors near output pins (220 µH)
2. Around this, 5 electrolytic capacitors (220 µF 35V)
3. Little to the right, 1 inductor marked 100 µH
4. Near this, 2 x 220µF 16V and one 100µF 35V capacitors
5. To the edge of the board there's a 220µF 16V capacitor

There's two four pin outputs which are L,R Tweeter +ve, -ve and L,R Speaker +ve, -ve. So total 8 speaker pins.

What all I've measured:

1. Voltage at the 5 capacitors is 23V
2. On the capacitors next to the 100µH inductor, it has 5V
3. Resistance of speaker output + and - is 98kΩ
4. Resistance of speaker output + and speaker output - both to ground is 48kΩ
5. No ICs get very hot when I run it
6. DC voltage across speaker output is 0.002V?

Other very notable thing I also noticed was that when I ran the audio board without connecting the speakers, there was the same screeching sound but much fainter coming from the audio board itself.

Touching or holding the inductors would only barely reduce the volume of the noise.

Connecting the speakers would amplify this same noise 10x as it would be coming from the board and speakers too.

Please guide me on what to do next.

⟐ Edited February 28, 2026 at 1:23 MST

⟐ Answered February 26, 2026 at 14:57 MST

⟐ Commented February 25, 2026 at 9:14 MST

⟐ Commented February 21, 2026 at 10:26 MST

Thanks for any input.

⟐ Commented February 19, 2026 at 12:24 MST

⟐ Answered February 12, 2026 at 22:37 MST