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400s cutting out intermittently - Printable Version

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400s cutting out intermittently - neXus 6 - 12-Aug-2022

Hi there.

Suddenly my 400s will power off and back on again without warning. It's not a power issue: I've eliminated that as a cause.

The master will cut out and then the slave will follow. Both restart seconds later.

Doubt it is a heat problem. Room temp is 22C and there is more than 2.5cm spacing between the devices.

Thanks for any steers.


RE: 400s cutting out intermittently - Pim - 12-Aug-2022

It looks like an issue with the master. If I were you, I would set them both up as stereo amps for a few days and see whether it is just the one amp that has the issue. Then send that one for repair.


400s cutting out intermittently - ghosttipper - 13-Aug-2022

Resetting both uniits. Have had an similar prob.


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400s cutting out intermittently - disarmamant - 13-Aug-2022

Could be an issue with one of the SD cards, or one of the SD card readers.

Have you got a spare SD card you can load the config file onto to try?


RE: 400s cutting out intermittently - neXus 6 - 13-Aug-2022

Thanks all for the tips.

I'll start with the reset and work from there.


RE: 400s cutting out intermittently - LeeC - 04-Jan-2023

(13-Aug-2022, 14:12)neXus 6 Wrote: Thanks all for the tips.

I'll start with the reset and work from there.

I've been having similar random switching off for months and have tried everything to no avail - has anyone found a solution?