1 EXHIBIT 23.1 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report included in this Form 8-K/A into Hadco Corporation's previously filed Registration Statements on Form S-8, File No. 33-2915, File No. 33-12555, File No. 33-24975, File No. 33-24976, File No. 33-40616, File No. 33-48288, File No. 333-11485 and File No. 333-47589. /s/ ARTHUR ANDERSEN LLP Boston, Massachusetts April 30, 1998