|First, the original power supply could have been defective or undersized months or even a year ago. And you could have seen the problem back then if using a multimeter. Same applies to finding what has failed before replacing the supply AND to confirm a new supply is sufficient. Price does not guarantee a sufficient supply. Multimeter reports imporant facts to even avert failures months later after the warranty expires.|
Second, is the problem instead a power supply controller lockout? Another power 'system' component is a power supply controller. Its safety lockout circuit is reset when the power cord is removed for 2 or more seconds.
Third, whining more likely was a failing fan. That would have been a separate failure. But only you can provide information to better answer that.
Fourth, what defines quality? Supplies must perform numerous functions. When selling supplies separately to computer assemblers (who typically do not know how electricity works), these supplies can 'forget' to include essential functions. Therefore increase profits. Is your supply sufficient? To sell a supply missing essential functions, they must also 'forget' to include a full page of numeric specs. That full page is a manufacturer claiming (in writing) that his supply contains those functions that all computers require.
Fifth, can a supply damage a computer? That is one of the so many required functions. A supply must never damage any other computer parts. And nothing in a computer should damage a supply. Did they 'forget' to include those functions to increase profits? If it does not include that long list of numeric specs, a responsible computers assembler avoids it. But most computer assemblers buy only on price and watts meaning many supplies are missing essential functions.
Sixth, leaving a computer on to protect it is bogus. No, this was not even a controversy. But many computer assemblers heard the myth; then automatically believe it. If leaving a computer on has advantages, then we do same for every TV and radio. If true, then radios and TVs would also come without any power switch. Turn it off when done. That is best for the machine. But then notice which one is answering with so many technical details. This answer comes from generations of professional knowledge.
Seventh - surge protector did nothing useful when the protector was too close to electronics and too far from earth ground. Have doubts? Then post manufacturer specs that define each type of surge with numbers for that protection. Notice - it does not even claim to protect from typically destructive surges. Any facility that needs surge protection (ie your telco CO) does not use power strip protectors. They need effective protectors. They use protectors that are part of a surge protection 'system'. A surge protector and surge protection are two different items. The former is a connecting device to the latter. You computer adjacent protector is not connected to protection ... which explains why it does not even claim to provide protection.
Don't take my word. View it yourself. View those numeric specs that define protection. Notice - no such specs exist.
View that full page power supply specifications. Numbers that define surge protection already inside a minimally acceptable supply.