First of all for a power adapter to blow up it must have had a major (and dangerous) fault. If it was me, I would take it back to Argos (Mikomi is an Argos Own Brand) and demand that they replace or refund forthwith or I would trake them to Trading Standards.
As evidence that you should get a refund. Which say that TVs should last for six years or they MUST have had a manufacturing defect when new and therefore under the Supply of Goods and Services Act 1982 Argos must fix your problem.
t, July 2008