Arcam AVR750 noise

[noomiij]

Hi, Had Arcam AVR750, few weeks ago developed crackling noise like old radio noise, from all speakers. It is present is all speakers in all modes except 7 channel stereo. I have reset it. Software, when I try to update, cannot do it online. Through USB, cannot find update, although it can find other files put on USB.
I opened it. 4 large capacitors seems to be bit loose and swollen. I am not sure, it is best to swap them and see.
I am using HDMI input. Checked all HDMI inputs and it is present in all.
Had anyone else had any issue like this before?
I am based in Saudi, Eastern region, nearest general amp repair service is about 150KM away, no Arcam dealer in country.
Any advice would be great. I am OK to do soldering, but donot know how to go through diagnostics.

 

[Gray]

....I opened it. 4 large capacitors seems to be bit loose and swollen. I am not sure, it is best to swap them and see.

Why not?
If you're ok with soldering, provided you get the same voltage and microfarad values and observe the correct polarity when fitting - you can't do any harm.

The looseness you describe could even be a dry joint - but renewing them will take care of that.

No guarantee of a cure - if those caps were causing the issue then I wouldn't expect the problem to go away in 7-channel stereo mode.....but you never know. You've got nothing to lose.

Good luck.