Hi all,
Apologies if someone finds a duplicate for this thread - any similar ones I've found, the solution hasn't worked for me, so I figure I'll ask my own question.
I stepped away from my PC to take lunch yesterday, and it had switched off by the time I returned. No response at all when I press the power button. Bad switch maybe? Also no response when I jump the power switch pins myself.
I've stripped it right down to core components (it needed a good dusting anyway) to help diagnose the problem:
When I power on the PSU, the motherboard's SB_PWR (standby power) LED comes on. No other response.
When I jump the power_sw pins, there's a small ramp on the PSU fan, but no other response.
When I disconnect the MB cable from the MB and bridge the GND and PS_ON pins, there's again a small ramp on the PSU fan and a slight charging of the capacitors (any other pwr/gnd voltage diff gives a steadily declining voltage after the PS_ON is grounded). PS_ON and +5VSB* are steadily at 5.2V whereas no other MB cable pins have a voltage.
I've not had a component outright die on me yet since I built this in December 2015 so I've not had to diagnose the error before.
Does anyone have any advice about what might be failing and/or what tests might help verify this?
Thanks a bunch,
Lexi
Follow up: I've removed the RAM and SSD. None of the Q LEDs on the board light up (particularly looking at the DRAM_LED). This has to be the PSU or motherboard right?
* correction
Apologies if someone finds a duplicate for this thread - any similar ones I've found, the solution hasn't worked for me, so I figure I'll ask my own question.
I stepped away from my PC to take lunch yesterday, and it had switched off by the time I returned. No response at all when I press the power button. Bad switch maybe? Also no response when I jump the power switch pins myself.
I've stripped it right down to core components (it needed a good dusting anyway) to help diagnose the problem:
- ASUS Z97-PRO GAMER motherboard
- Intel i5 4690K CPU
- 1x4GB HyperX 1866 DDR3 RAM in A2 slot (originally 4x4GB)
- EVGA Supernova NEX650G modular ATX PSU - 5 yrs old but no issues til now
- Samsung 850 EVO SSD 250GB (boot drive)
- Corsair H55 AIO cooler (fan and pump connected to CPU_FAN and CPU_OPT on mobo)
- CPU power, MB power, and SATA data & power cables
- USB and HDMI out to keyboard and monitor
When I power on the PSU, the motherboard's SB_PWR (standby power) LED comes on. No other response.
When I jump the power_sw pins, there's a small ramp on the PSU fan, but no other response.
When I disconnect the MB cable from the MB and bridge the GND and PS_ON pins, there's again a small ramp on the PSU fan and a slight charging of the capacitors (any other pwr/gnd voltage diff gives a steadily declining voltage after the PS_ON is grounded). PS_ON and +5VSB* are steadily at 5.2V whereas no other MB cable pins have a voltage.
I've not had a component outright die on me yet since I built this in December 2015 so I've not had to diagnose the error before.
Does anyone have any advice about what might be failing and/or what tests might help verify this?
Thanks a bunch,
Lexi
Follow up: I've removed the RAM and SSD. None of the Q LEDs on the board light up (particularly looking at the DRAM_LED). This has to be the PSU or motherboard right?
* correction
Last edited: