Proton AM2 issue

Hi, everyone.
Hope this is the right place to ask..
I own this nice little amp with a problem that, while playing, one, or the other channel, shut off.
I was able to trace the problem to the input connectors. With the cover off, gentle bending the back panel, the sound reprise.
Is a known issue of these units? Defected PC trace, cold solder?
Thanks in advance for any tip.
 

Attachments

  • IMG-20200307-WA0013.jpg
    IMG-20200307-WA0013.jpg
    486.5 KB · Views: 111