baffled - power button issue.

labbby · 30 May 2023 at 13:54

So this is a new one for me. I have a bit of a bizarre situation going on with the power button on my rig.

I used to have a Corsair 900D case but after spilling some coffee over the front end of it I noticed that the power button had become sticky then after a while it stopped working all together, this wasn't a big deal because I wanted to replace that big old thing anyway.

So last week I ordered the Lian Li 011D and all was well, the power button on it was doing exactly what it was meant to do until today. The power button will not turn the machine on but it will turn it off.

Interestingly if i reseat the headers with the PSU turned off, once i turn it back on again the button will power up the rig but only once then goes back to not responding.

I've tried the following -

bios update.
cmos reset.
reseating the headers and cleaned them.
checked psu cables.

I'm stumped, I've never had an issue like this before. All i can think of is the JFP1 header is failing on the board but if that was the case would it shut the machine down every time ?

The only thing I have changed since getting the new case was a AGESA windows update.

Any ideas ?

I think my rig is in the sig but if not -

MSI tomahawk x570
5900x
4090
PSU is xfx 1250W black edition.

Armageus · 30 May 2023 at 14:02

labbby said:
PSU is xfx 1250W black edition.

How old is this? (The reviews I can find suggest 2011-2014?)

I'd suggest it's actually the PSU failing to start rather than an issue with the power button.

To rule out the button you could try shorting the two power switch pins of the JPF1 header with something metallic e.g. end of a screwdriver

LuckyBenski · 30 May 2023 at 14:09

+1 for ruling out the power button with a temporary button or just shorting the pins

Armageus · 30 May 2023 at 14:33

LuckyBenski said:
+1 for ruling out the power button with a temporary button or just shorting the pins

Yep could also try using the reset button for the power button

But again looks like it might just be a failure mode of this PSU design:

XFX Pro 1250w power on issue!

Have a system with an XFX Pro 1250w that doesn't want to power the system on until you've switched it on/off multiple times! Been working fine for...

forums.guru3d.com

labbby · 30 May 2023 at 14:38

LuckyBenski said:
+1 for ruling out the power button with a temporary button or just shorting the pins

I don't think it's the actual button unless I'm unlucky and had two faulty buttons on two cases.

Ill give it a go now.. Ill short it now though.

labbby · 30 May 2023 at 14:40

Armageus said:
How old is this? (The reviews I can find suggest 2011-2014?)

I'd suggest it's actually the PSU failing to start rather than an issue with the power button.

To rule out the button you could try shorting the two power switch pins of the JPF1 header with something metallic e.g. end of a screwdriver

Yeah it's getting on a bit, i think it was 2012 I got it.

Interestingly (no idea if this is an actual thing) but if I flick the PSU off then on quickly it will power up the rig.

labbby · 30 May 2023 at 14:46

Armageus said:
Yep could also try using the reset button for the power button

But again looks like it might just be a failure mode of this PSU design:

XFX Pro 1250w power on issue!

Have a system with an XFX Pro 1250w that doesn't want to power the system on until you've switched it on/off multiple times! Been working fine for...

forums.guru3d.com

Ah brilliant find. Yeah it won't let me short it.

I guess it's new PSU time. Thanks for the help guys.

I see the PSU market has gone nuts as well :cry:

Tetras · 30 May 2023 at 16:00

labbby said:
I see the PSU market has gone nuts as well

Are you going ATX 3.0? The bequiet 12 M is reasonably priced on OCUK, most others are near (or above) £200 for 1000 watt

lsg1r · 30 May 2023 at 16:18

To be fair the o11 evo power button isn't the best power button I've ever used.... I sometimes need to press it twice to register, it feels like it's mounted at a slight angle compared with the button, and it's not down to the psu etc as it was all new at the time.

Likely is the psu in this case but don't discount the button being rubbish lol

labbby · 30 May 2023 at 17:16

Tetras said:
Are you going ATX 3.0? The bequiet 12 M is reasonably priced on OCUK, most others are near (or above) £200 for 1000 watt

I looked at that but ended up going for a MSI 1000w ATX 3.0 for 169.99 ill probably regret it but hey ho.

Tetras · 30 May 2023 at 19:29

labbby said:
I looked at that but ended up going for a MSI 1000w ATX 3.0 for 169.99 ill probably regret it but hey ho.

I can't comment on the nature of your problem, but just the PSU, no, I don't think so

MSI can certainly boast about the quality of the MPG A1000G PCIE5. Despite the relatively simple topology and the use of mid-range active components, each and every component found in the unit is of top quality. CWT did an excellent job designing this platform and layout too. It is very crowded and probably disadvantageous for the manufacturer themselves, but it manages to offer enough clearance for a 135 mm fan to fit and still the heatsinks are sizable, which plays a major role in the thermal performance and long-term reliability of the PSU.

In terms of performance, the MSI MPG A1000G PCIE5 did very well, perhaps even a little better than what we usually expect such a product to reach. It delivers exceptional power quality, with minimal voltage fluctuations across the entire load range. The energy conversion efficiency is stellar at low loads but drops sharply at high loads, resulting in the 80Plus Gold certification. It also runs relatively cool, which is a very good thing for the long-term reliability of any such design. The only weak link here is the aggressive cooling profile – on one hand, it is responsible for keeping the operating temperatures very low but, on the other hand, it also makes the MPG A1000G PCIE5 run loud when having to cope with loads greater than 500 Watts. Our only true concern lies with the very slack OCP/OPP protections – they do work but these seem to be set a little too high, which limits the unit’s ability to timely react to a real fault and properly protect the rest of the equipment.

The MSI MPG A1000G PCIE5 PSU Review: Balance of Power

www.anandtech.com