The fuse is absolutely replaceable, not sure to what the other poster is referring. I just replaced the fuse today (not the main computer, nor the motherboard, nor anything else but the fuse and the approx 1/2" metal wires/leads running from the motherboard to the fuse.
I did mention that others were having problems with this unit to LG Customer Service at that phone number and they were unable to help me out other than to say, Sorry, you don't have an extended warranty on your 15 month old fridge? That's too bad. We feel really bad about that....
Good info about the lights staying on in the fridge though they should be off if the doors are open. Sounds like a larger problem if the lights are always on.
LG's suggestion was that the fridge go on a dedicated line and breaker from your main panel. It's probably good advice and it is advice that I will follow up with a call to my electrician.
More info below:
Here is a little more review:
Unplug fridge. Pull out from wall. Be careful not to stress/break ice-maker line if installed.
Open panel on back of fridge (the one at hip height that says Service Panel Only - Do Not Remove, blah blah blah)
See pictures of opened panel here: http://www.amazon.com/LG-LFC23760SW-French-Refrigerator-White/dp/B00198A5C0/ref=cm_cmu_up_thanks_hdr (more comments posted on Amazon regarding LG Customer Service)
Replace fuse with 9A 250V slow-burn fuse. I used a gray fuse harness from Radio Shack so that if the fuse needs to be replaced again I can just pop in a new one without doing the soldering over.
Since I nuked the original fuse, the end-caps and the wires that went from the end-caps/fuse to the motherboard. I replaced the leads (wires) with some I scavenged off a fresh thermal fuse (also bought at RS, just needed the wires themselves which seemed to be the same diameter/gauge as the original leads) and ran them through the back of the motherboard to the wire harness.
Use a hot iron. (but don't burn yourself).
So far, so good!
If still working in a few hours enjoy a cold beverage... you just saved yourself a lot of $$! The company LG recommended to buy parts was closed (it was a Saturday) and HHGregg was open but they wanted $273 for a replacement motherboard. A trip to RS even if you had to buy a soldering iron and solder is still cheaper than that.
Good luck to you.