Error code
E-83
Meaning
Main and sub control boards cannot communicate
Moderate
What to do
Why this happens
Possible causes are an uninserted connector (CN201) on the main PCB, an uninserted connector (CN02) on the sub PCB, short circuits between pins on either the Main PCB or Sub PCB, harness damage or disconnection, and pattern damage on the PCB.
How to fix it
Reseat connectors; if error persists, replace harness or PCB
SourceSamsung service manual