One of the issues with ACL is that it always talks about "reasonable time" that a product should expect to work. What is a reasonable time for a laptop? 3 years? Can you separate the laptop parts from the rest of it, e.g. it is reasonable for the laptop to last 3 years but the battery may only work 18 months? What about a smartphone, considering that a lot of Joe Bloggs change their phone easily between 18-24 months at a time?
As much as I am right, I wouldn't want to get into a shouting match with a retailer over what constitutes a reasonable amount of time, plus then having to follow up with legal letters, going to tribunals, etc.... it may not be a case of losing any money but it is the time burned up. If we could assume that retailers and their staff were reasonable enough people (large assumption), there would not be a real problem.
In any case, the advice in the first hand here is the same: back to base contact, and preferably not through the manufacturer first hand.