malfunction

verb

the computer has malfunctioned:

crash, develop a fault, go wrong, break down, break, act up, be defective, be faulty, fail, cease to function/work, stop working;

informal conk out, go kaput, fall over;

British, informal play up, pack up.

noun

a major computer malfunction:

crash, breakdown, fault, failure, defect, flaw, collapse, impairment;

informal glitch.

malfunction Oxford Dictionary of English