Samsung 4) When PANEL PCB KEY is not selected, 3) When PANEL PCB doesnt light up

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Diagnostics
1. "Beep-Beep" sounds do not go off except Forced Operation & Forced Defrost.
2. It is checckableatPanel PCB when Forced Operation or Forced Defrost is selected, so when error occurs,
check it andcorrect theerror.
Note
Re-insert Connector,
Check contacts
Is Connector of Upper
Hinge Cover inserted well?
Start
NO
YES
Re-insert MAIN PCB Connector,
Check contacts
Is insertion of MAIN PCB
Connector (CN50) normal?
NO
YES
Re-insert PANEL PCB Connector,
Check contacts
Is inssertion of PANEL
PCB Connector normal?
NO
YES
Re-assemble PANEL PCB COVER
Is there any
pressed KEY?
NO
YES
Change PANEL PCB
4) When PANEL PCB KEY is not selected
3) When PANEL PCB doesn’t light up
Check REG101 parts, Change PCB
Is MAIN PCB 12V normal?
(REG101)
Start
NO
YES
Re-insert Connector,
Check contacts
Is Connector of Upper
Hinge Cover inserted well?
NO
YES
Re-insert MAIN PCB Connector,
Check contacts
Is insertion of MAIN PCB
Connector (CN50) normal?
NO
YES
Re-insert PANEL PCB Connector,
Check contacts
Is inssertion of PANEL
PCB Connector normal?
NO
YES
Change MAIN PCB