Question PSU intermittent start up

fantrace

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Sep 3, 2001
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I have been having problems starting up my machine. Sometimes when starting, it powers down again after about 5 secs. A second press of the power up button starts OK. Nuisance at the moment but it is becoming more frequent so I'm concerned it might fail altogether at some point. Also rarely, the machine can hang during power up and requires a forced power down and restart.
So I'm considering replacing the PSU, but is that the most likely cause of the issue or could it be a MB problem?

PSU is Corsair CX750
MB is Asrock ZH77 Pro 3
CPU is i5-2500K (3.3GHz)
Memory is 2 x Kingston 4G DDR3-1600 + 2 x Crucial 4G DDR3-1600
Graphics is Radeon R7 370 series
Storage is Samsung SSD 840 EVO 250G + Western Digital 1.5TB & 500GB SATA HD.
OS is Windows 10 ver 10.00.17134
 

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