Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
[URL="http://www.newegg.com/Product/Product.aspx?Item=N82E16817371033"]Antec EarthWatts Green EA-380D Green 380W Continuous power ATX12V v2.3 / EPS12V 80 PLUS BRONZE Certified Active PFC Power Supply [/URL]
The issue with this supply has nothing to do with capacitors: it was simply DOA.Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
[URL="http://www.newegg.com/Product/Product.aspx?Item=N82E16817371033"]Antec EarthWatts Green EA-380D Green
johnmeyer
Member
Last Activity: 02-27-2023, 09:20 PM
Joined: 01-15-2010
Location: Carmel, CA
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
Antec PS arrived an hour ago from Newegg. It is DOA. Bummer.
I'm giving up on this project. I can still use the computer as long as I unplug it between uses. I've killed way too many hours on this. I'll wait until it is totally dead, and then decide if I want to spend more hours trying to troubleshoot and fix it.
It won this round ... (so much for my 40-year-old EE degree).Leave a comment:
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
I purchased a new power supply from Newegg. I'll post here next week as to whether this fixed the problem.Leave a comment:
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
Yes, they are HM, but I used them on the motherboard.
I did a partial re-cap of the PS tonight, but the problem remains.
So, I've partially re-capped the motherboard, but don't want to proceed further because it is so difficult to remove and then replace the caps connected to the huge ground plane, and the ten year old PS probably isn't worth spending more time doing a complete, proper re-cap. For now, the computer continues to run fine, as long as I unplug it and wait for ten minutes before trying...Leave a comment:
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
I am well aware of that, but it took me about four hours to replace the seven caps (it was seven on my mobo, not ten) because of the problem I mentioned earlier. I've never had that problem before (of having a ground plane act as a heat sink and not allowing the solder to flow). The problem was so severe that I even had a problem soldering the new caps.
Thanks, that is very helpful and is the conclusion I quickly came to when I opened up my case, saw the fan facing the interior, put my hand on the back of the...Leave a comment:
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
Quick P.S. to last post: I opened my main PC to look at the PSU, and the fan faces the interior of the case, so I guess I could do the same thing with this PSU.Leave a comment:
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
Thanks for the very quick reply.
There are three caps under that heatsink, or in the vicinity (all SEK 105C): 470 uF 16V; 47uF 35V; and one that can't be read without removal because its labeling is touching the heatsink. None of these values is what I'd expect for a 5V circuit
As for using the Seasonic PSU recommended by Mockingbird, it has a fan configuration that doesn't fit my case (the Sparkle FSB350-BN has fan facing the rear -- click this link: [URL="http://www.sparklepower.com/pdf/FSP350-60BN%2812V%29.pdf"]FSP350-60BN)[/URL],...Last edited by johnmeyer; 05-06-2013, 04:52 PM. Reason: added additional info about Sparkle lifetimeLeave a comment:
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Re: Intermittent power on - P4PB-400 w/ FSP350-60BN PS
I'm trying to locate these on my PSU:
Based on your advice, I've been searching other posts re: 5VSB problems, and your diagnosis seems to match exactly the problem I'm having.
None of the caps in my PS is bulging, so I'm going to have to locate based on getting a schematic or obtaining some advice. I really don't want to re-cap the whole supply, if I can avoid it.
You are asking about the mobo caps. I used these (from Digi-Key):
[URL="http://www.digikey.com/product-search/en?x=0&y=0&lang=en&site=us&KeyWords=uhm0J222MPd3-nd"]Nichicon...Leave a comment:
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Intermittent power on - P4PB-400 w/ FSP350-60BN PS
[B]Symptom:[/B] If computer is unplugged from the wall outlet for 15 minutes, and then plugged in, I can press the "on" button and the computer starts and runs for as long as I want. But, if I power down, but keep the computer plugged in, when I later press the "on" button, nothing happens. However, sometimes if I press the on button 15-20 times, the computer eventually starts.
[B]System components:[/B] Motherboard: ASUS P4PB-400. P/S: Sparkle FSP350-60BN.
[B]First fix attempt: [/B] The seven 2200uF 6.3V caps (GSC) on MB were leaking. Replaced... -
Re: Samsung 172T Intermittent (blinks off, then back on)
I actually still have this display in the shop, and haven't touched it for the last year. The display refresh is an interesting thing to check because I know that I did change that to a higher refresh many years ago. I'll check that. As for voltages, I didn't check that the last time I had the display apart. I'll do that again. I'm also going to re-solder all the PSU PCB points. I've had TV sets (my old Pioneer 43" CRT) develop thermally sensitive connections on the PCB.
Thanks for the help!Leave a comment:
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Samsung 172T Intermittent (blinks off, then back on)
This Samsung 172T powers up fine, and looks normal for about 1-2 minutes. Then, it blinks off for a few seconds, then comes back on again. As it continues to operate, it spends more and more time off, and eventually only comes on for a few seconds.
It makes no unusual sounds and, when it is operating, the display is perfect, has normal brightness, and does not flicker.
I have swapped out both the power cable and the cable between the monitor and the computer. Neither change stopped the problem.
This behavior started several months ago, and when it...
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