Re: never had a psu fail this way: what would cause psu to repeatedly shut itself off
oh sorry, i didn't realize there could be so much interpretation about the symptoms.
the delay has nothing to do with system post. the entire post process (pre, during, post) proceeds at a predictable pace.
when i press the power button nothing happens--complete silence. no hdd or fans spinning; no video card output signals. then after an indeterminate delay of up to 10sec or so the whole system whirs to life and then proceeds to boot normally. ocassionally, the system...
stanwebber
Member
Last Activity: 12-18-2022, 01:18 AM
Joined: 03-09-2022
Location: hanover park, il
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Last edited by stanwebber; 04-13-2022, 10:44 AM. -
Re: never had a psu fail this way: what would cause psu to repeatedly shut itself off
so i have about 30hrs on this new (old) psu and my system hasn't crashed or restarted even under sustained stress testing. however, there is still a somewhat consistent delay from when i push the power button until the system powers on--sometimes 10 sec or more. the system always powers off immediately. which component is likely responsible for the startup delay? the motherboard or the psu?Leave a comment:
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Re: never had a psu fail this way: what would cause psu to repeatedly shut itself off
you make it sound so attractive...thanks for the offer, but an isa slot is a prerogative. besides, i had a pair of abit kv7 boards i gave away that i could probably get 1 or both back if i asked to run an xp barton if i really wanted to.
i think the kk266plus-r will ultimately work out. it's nice to have the arsenal of overclocking options back that i gave up with my last retro build. i got the fsb to 140 stable without even trying (no vcore adjustment or anything)....Leave a comment:
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Re: never had a psu fail this way: what would cause psu to repeatedly shut itself off
cross flashed to what? there are 4 specific bios releases for the kk266 boards so i don't think they're overly generic:
- kk266
- kk266-r with ami raid
- kk266plus
- kk266plus-r with hpt raid
i did upgrade the hpt372 firmware to the last released version, but i don't know what else can be modded in the bios--would love to add microcode for barton athlons....Leave a comment:
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Re: never had a psu fail this way: what would cause psu to repeatedly shut itself off
i wrote off your comment at first, but i'm starting to reconsider. the board is quite idiosyncratic, but it performs very predictable in its weirdness. here are a few of the 'features' i've run across so far:
- irq is happily shared when usb 2.0 card is in pci slot 4 UNTIL usb legacy support is enabled then the hpt372 onboard raid is nonfunctional
- irq is happily shared when usb 2.0 card is in pci slot 5 in winxp, but ide controller is not recognized in win98se...Leave a comment:
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Re: never had a psu fail this way: what would cause psu to repeatedly shut itself off
motherboard is an iwill kk266plus-r, athlon xp 2100+, 512mb pc-133, radeon 9800 non-pro, awe64 gold, nec usb 2.0Leave a comment:
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never had a psu fail this way: what would cause psu to repeatedly shut itself off?
i've had dozens of pc power supplies, mostly cheap and a few expensive, go out on me in spectacular and not-so-spectacular ways...while running or even just plugged in and powered off (+5v standby actually blew up 2 units). this most recent failure is a new one on me though. i installed an old 350w just pc inc. model jpc-350-12v in an athlon xp system with a radeon 9800 non-pro. a cheap build, but with good 5v (35a) and 3.3v (28a) stats for a pentium 4 psu plus it had 50% more weight than the previous ultra-cheap 500w psu that blew.
the new power supply operated for maybe 12hrs non-continuous...Last edited by stanwebber; 04-03-2022, 02:31 PM. -
Re: did bad capacitors kill my motherboard or prolonged exposure to faulty psu?
removed the cover and the psu internals are incredibly busy...would take considerably more disassembly to get a good look at everything. i took some photos, but i'm really not motivated to go further.
the cpu fan is a possibility to check. the iwill motherboard i transferred it over to reads 0 rpm on the cpu fan header, but i ran across some contemporary reports on iwill motherboards not detecting lower rpm fans so i didn't give it any more thought since mine runs low....Leave a comment:
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Re: did bad capacitors kill my motherboard or prolonged exposure to faulty psu?
momaka, thanks for all the suggestions, but i was pretty exhaustive in my troubleshooting efforts. i stripped down the board to just cpu, ram & video--then just cpu only. at that point i wasn't trying to get it to post, but just wanted to hear some kind of beep. i even swapped out the pc speaker from a working pc just in case. i also swapped out the cpu and ram with spares. one notable thing to report is that with the cmos jumper in the reset position the psu would not power on just like if the motherboard...Leave a comment:
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Re: did bad capacitors kill my motherboard or prolonged exposure to faulty psu?
WITH an isa slot....Leave a comment:
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Re: did bad capacitors kill my motherboard or prolonged exposure to faulty psu?
here's an image of the board and closeups of the largest capacitors as best i could manage with the available light. the northbridge heatsink isn't missing--i scavenged it for the replacement system. i don't ever plan on putting the psu back into continued service, but i still have it and can take some photos of the internals tomorrow for the curious....Leave a comment:
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did bad capacitors kill my motherboard or prolonged exposure to faulty psu?
i've got a pretty rare motherboard that i'm evaluating for repair. it's a biostar m7mia-raid which is the only ddr socket a motherboard ever produced, consumer or industrial, with an isa slot. its 20 years old now and finally gave up the ghost last month. i was saving a dd image of the hdd to a portable usb drive when i found it unresponsive with a black screen and a solid lit hdd led. after forcing it to power down it never posted again. the psu/cpu/case fans will spin and the onboard motherboard power led will light up, but no beeps or error codes even with the cmos reset and ram plus all expansion... -
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joined this forum to ask about a 20yr old motherboard that just died. bad capacitors would seem obvious (although no physical indications), but the system ran with a defective psu leaking voltage for years so i want to ascertain the impact.Leave a comment:
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