From: bobnospam@gmail.com   
      
   This speaker system I used on my main computer died yesterday - no power   
   at all.   
      
   I traced the problem to the transformer, a 12.5V 2.5 A TP57U25F from Ten   
   Pad Industrial. Testing the transformer coils, neither the 117V input or   
   the 12.5 V secondary show conductivity - they are both open circuit. The   
   fuse for the primary circuit was not blown.   
      
   My question here is, if both coils are open circuit, does this suggest   
   that a major short on the PC board got the transformer too hot so it   
   tripped temp circuit cutoffs in both coils, so it is unlikely that   
   replacing or fixing the transformer will fix the speaker? Or, is this   
   kind of failure common for such transformers?   
      
   If I wanted to try a different transformer to test the board, what   
   should I want the transformers open circuit voltage to read on my   
   Greenlee DM-20 DVM.  Should that be 12.5V? I do have a variable voltage   
   variac I could use to adjust a slightly higher voltage transformer down   
   to 12.5 or whatever should be needed.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)