The SE or 5E error code suggests a motor or PCB fault, this would certainly require the unit to be stripped down to test further.
From experience I would suggest its most likely to be the motor at fault.
Can you advise the model number of your LG Intellowasher washer, so I can look up the part for you. The cost is likely to be around £100.
If you would like me to recommend someone to come out and repair your washer for you, please let me know your post code.
No problem, so I can close the case I would appreciate if you can rate the service received.