My hubby has similar liver readings. He stopped alcohol for a week with no change. It turns out it was his medication for high cholesteral that was causing the problem.
If your hubby is on any medication, that could account for it. GP's are great at prescribing meds (especially for cholesterol - dont know anyone who does not have high cholesterol nowadays
) but never tell you the effects on the liver and other organs. Then they send you for a barage of useless tests - without looking at the obvious reasons first.
If you need anymore info, just pm me. Been over here nearly two years now from the UK.