IMG Stage Line STA-1000 showing wrong operating mode on the display

I bought it for 20 euros and have recapt it because they were leakey.

when dip switch is in STEREO mode it shows BRIDGE on the display
when dip switch is in BRIDGE mode bridge it shows PARALLEL on the display
when dip switch is in PARALLEL mode its shows BRIDGE on the display

left speaker output chanel works but not right speaker output chanel when I have dip switch in stereo mode.

I think it could be some ic that is connected to the display and the dipswitch that has given up?
Anyone know what this could be?
 

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