Leaving PC on Vs. Turning it Off

Which is why all light bulbs, the car, and every television and radio are also left on.  On/off switches exist to cause higher failure rates - increase sales.

  Or then we consult the few who actually repaired many of these things only to also learn why each one failed.   For example, he turned it off.  It would not restart.  That proved power cycling was destructive.  Then I located the actual failure.  A pullup resistor on the power supply controller circuit.  That resistor had only one function - to provide bootstrap power during power on.  Since left on 24/7, that pullup resistor burned out and failed.  A failure that became obvious only much later.  Failure directly traceable to too many hours of operation.  A 180 degree different conclusion once wild speculation is replaced with facts and logic.

  Turn it off when done to increase life expectancy.  That 'cooling' is near zero - trivial.  How many degrees does it cool?  Ten?  When it was constructed, those parts were repeatedly temperature cycled many hundreds of degrees - which is also not harmful.  Just a few numbers that most will ignore to recommend "leave it on".

   This is not even debatable.  "Leave it on" is a symptom of popular myth and ‘ignore the numbers’ reasoning – also called junk science.

  Same applies to the many who foolishly recommend a protector adjacent to the appliance. Recommend only because they were told to; did not bother to ask some damning questions.  For example, how does that protector stop what three miles of sky could not?

  Any protection that works at the appliance is already inside the appliance - as required by standards that existed long before the IBM PC existed.  All appliances contain surge protection.  Your concern is a rare anomaly that occurs typically once every seven years.  That will overwhelm appliance protection.  That cannot be stopped or absorbed by those APC, et al protectors.  That must be connected to earth before entering a building.  How do high reliability facilities do it for over 100 years?  No plug-in protectors.  They use a properly earthed ‘whole house’ protector.  Why?  They need effective protection.

  How to spend tens or 100 times less money for the only solution used in building where damage can never happen?  Only more responsible companies sell a 'whole house' protector - ie General Electric, Siemens, Keison, Square D, Polyphaser, Intermatic, or Leviton.  A Cutler-Hammer protector sells in Lowes for less than $50.  What protects your dishwasher, clock radio, and furnace?  All need the same protection.  What most needs protection during a surge?  Smoke detector.  What protects it?  Same thing that is the best protection for every electronic device.  A properly earthed (ie 'less than 10 foot connection to earth) 'whole house' protector.

  Where does energy dissipate?  Will a few hundred joules inside a power strip absorb surges that are hundreds of thousands of joules?  Numbers that are ignored to promote myths.  A plug-in protector can even give a surge more destructively paths through nearby appliances. Yes, can even contribute to appliance damage.  Either earth energy before it enters the building.  Or that energy hunts for earth destructively via appliances.  An anomaly that occurs typically once every seven years.  A solution provided with technical reasons why.  A solution that costs tens or 100 times less money is ...  Well, where is the dedicated ground wire on that APC?  Where does APC even discuss earthing? When selling a $3 power strip with some ten cent protector parts for $25 or $150, why would they be honest?  A protector is only as effective as its earth ground.

Thanks Westom.  That was very informative.