The best way to handle technical replicates often depends on the context and the overall experimental design, which you haven't told us much about. Why did the experimenters make the technical replicates? What were they hoping to learn? Generally, however, if you have multiple arrays from one same patient sample while all other patient samples have only one array, then averaging the 5 arrays would be the logical strategy. Alternatively you might choose the best array out of the 5 in terms of quality criteria and discard the other four.