3 Replies Latest reply: Mar 21, 2013 12:19 PM by Angela N. RSS

URGENT PLEASE! How to stop constant whistle just started suddenly???

adela Member
Currently Being Moderated

2009 bought Back-UPS-ES 450/550G.


It just now all  of a sudden started this incredibly loud, maddening, nonstop whistle!!!  It's making me very sick!!!  In desperation I pressed the little button by the side of the light but it stopped my computer and I lost all the works I was working on!!!  PLEASE someone tell me ASAP how to stop it AND tell me WHY this happened? 


Thanks very much! 


P.S.  I hope I'll receive answers to my email as I don't see here where it says "Instant notification".....

More Like This

  • Retrieving data ...


  • Correct Answers - 8 points
  • Helpful Answers - 4 points