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
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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".....

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