Though the liver only 'self heals' if you've not reached the cirrhosis stage. That can be stopped in its tracks in certain cases by removing the cause of the damage (by far the commonest is excess alcohol, but not exclusively so). Certain fats are bad, but the liver likes to work for its keep and some fats can be good for it.
I have liver disease, due to autoimmune antibodies, and it's advanced a bit lately, but I've never had jaundice. Mine was picked up years ago in a routine blood test. I do have other symptoms now, though I didn't years ago.
There's a kind of capsule round the liver, which is why a biopsy in that area aint necessarily painless. People with liver changes do get pain, sometimes, but it may be put down to other things, as somebody above has said.
Lots of rubbish is talked about liver disease. I am quite shocked at the ignorance amongst friends, who are generally mature and well educated.
Lots of info on British Liver Trust website, for those who are interested in more on diet, safe drinking, looking after your liver, etc. And wot diseases you can get if you're unlucky. 