Dee,
 Please stop using this machine at once!
A fuse blows because of excess current flowing through it, current means HEAT and heat can mean FIRE.
A 16 amp fuse in place of a 5 amp fuse that continues to blow means major overload.
This much current surely is related to power, as opposed to low voltage supplies.
My first instinct tells me that there may be a pinched wire carrying AC mains voltage arcing to the case,
 this possibly occured when the power supply was replaced.
 Please have someone knowledgeable check this out.
best wishes,
Hal Seabolt
  ----- Original Message ----- 
  From: Dee Hurst<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Monday, October 24, 2005 8:43 AM
  Subject: [PCBUILD] why does it keep blowinga fuse??


  My daughters fairly old pc keeps blowing the fuse in the plug (I'm in the
  UK). It had a new power supply, heatsink and fan about 6 months and was fine
  but then a couple of weeks ago this started. Sometimes it will stay on for
  just a few minutes, sometimes an hour or more. (Fuse is currently 16amp -
  originally it was 5).
  Spec is AMD Athlon 1200 processor, 120mb RAM, 20G HDD, running XP. I know
  it's pretty old and it's short on RAM and the processor is slow but it was
  fine for what she used it for (typing letters, browsing eBay, internet
  banking, email etc). No programs or hardware have been recently added

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