Error code
-SE-
Meaning
Keypad circuit short detected
Moderate
What to do
Why this happens
Possible causes include a keypad cable not inserted into the sub PCB connector, short circuits between the sub PCB connector and keypad cable pins, damage or shorts within the keypad cable itself, or touching of sub PCB connector pins.
How to fix it
Repair or replace keypad cable; if problem persists, replace sub PCB
SourceSamsung service manual