<<< Door has no tension when opening, assuming hinge cable broke, is that a pain to replace? >>>
Depends on the Serial Number
The original LG dishwashers---have metal side panels---requiring that the dishwasher be fully removed from under the counter.
Both side panels must be removed to access the door cables
Later models have no side panels---the dishwasher can be removed/pulled out 1/3 from under the counter to access/replace the cables (which have been improved btw)
<<< It also leaks sometimes at the bottom center of the door, hopefully caused by broken hinge cable.>>>
If the leak occurred *after* the door cable snapped/broke---then the possibility is high---that the hinges were damaged
The door on this model is quite heavy---a free-fall drop of the door can bend/damage the hinges and/or dishwasher frame.
If the leak was an issue *before* the door cable failed---the most likely cause is from a *defect* in the GUIDE ASSEMBLY
If the dishwasher was built between 2005 and 2010---the Guide Assy (4975DD1001A)---must be replaced
The symptom that occurs---is that the dishwasher develops a leak at the door after the cycle has been running for a period of 30 minutes to an hour (usually an intermittent leak---does not occur at all times)
When ordering a replacement Guide Assy---it's imperative that the *build date* on the Guide Assy (ink stamp) shows 2011 or newer
The part number of the Guide Assy was *not* changed. Build Date is used to determine whether the part is the original---or the newer revised/corrected part