does anyone know if the board model has suffered from bad caps. the board is an AOPEN MX46 533GN (skt 478). my problem is that the system is very unstable. i have tried windows 2000 pro and server, xp pro and home and also 2003 server std and enterprise. no matter what operating system i try the system is alway unstable. i have run memtest and pc check on the system and it always passes. there is no signs of any bad caps or damage on the board and the PSU is ok. could it be heat related or another problem. maybe i should consign the board to where it came from (the local tip) incase you are wondering i have a brother who works in a recycling centre and he collects computer parts for me. i have had some fantastic parts and built some very good systems from the parts which has made me a lot of money. this board was very good when i first had it (2 years ago) but it has been a pig for the last 6 months
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Re: Bad Caps Or Stability Problem
It would help if you tell us what the caps on it are.
I haven't seen a lot of Aopen boards.
The ones I have seen had a mix of good and bad brands.
They tend to use a lot of G-Luxon outside of the VRM which isn't the greatest idea they even had.
I've forgotten who, but one of the members here is into Aopen boards so maybe he'll trip in eventually.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
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Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
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You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Bad Caps Or Stability Problem
I've had a MX46 in before now that needed a recap. I can't remember what caps it had fitted as standard, but they where failing and causing instability.
A quick recap sorted it out.Comment
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Re: Bad Caps Or Stability Problem
was there any visible signs of failing caps as my board looks perfect. not sure on what the caps are as its still in the caseOriginally posted by HarveyComment
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Re: Bad Caps Or Stability Problem
They usually aren't good one day and bloated the next.
There's a time in between where they are marginal and that might be a day or it might be 2 years.
When they are marginal the system will be unstable.
You have a board form a brand with a history of using cheap caps, a board with an apparent history of bad caps, and it's unstable.
I'd say it's time to belly up to the soldering table.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Re: Bad Caps Or Stability Problem
I have recapped lots of Aopen boards. (AK73 and AK77 boards)
The crappy Lelon caps sometimes go bad and blow up from the underside with their vents still flat or bulged a little.Attached FilesComment
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Re: Bad Caps Or Stability Problem
i have now removed the board for a closer look and i still cannot see any damage of any kind. there are a few rubycon caps on the board but not in the area of the CPU. i have taken a photo of the caps around the CPU to see if you can ID them. dont worry about the white mark on the lowest cap as its only a bit of heatsink compound off the CPUAttached FilesComment
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Re: Bad Caps Or Stability Problem
Those look like good caps actually.
You have Panasonics at Vcore and Nippon KZE's for the VRM input.
Neither of those fail very often.
There's a G-Luxon over by the USB port but I don't think that's a stressed cap.
The problem probably isn't the caps, at least not those.
What do you have over by the RAM?Comment
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Re: Bad Caps Or Stability Problem
Didn't KZE's from this era have a problem with heat, and go bad under very little heat?
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Re: Bad Caps Or Stability Problem
Nope. - That was KZG and presumably KZJ. - And they are still a problem.
KZE are a much older series. I'm pretty sure they are different electrolytes.
Saw an ad (new product announcement deal) for KZG and KZJ that was hootin' and holarin' about their 'new' electrolyte.
KZE was already an old series by then.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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Re: Bad Caps Or Stability Problem
With reservation I agree with gdement.
With reservation because only 3 KZE is a slight bit light duty for a P4 VRM 'in'. (If there were 4 or 5 that would give me a warmer fuzzy.)
That and I can't see what series the Panasonics are. With only 6 and with KZE on the other side I hope they are FJ series.
Are you sure this wasn't previously recapped?
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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Re: Bad Caps Or Stability Problem
there are some black rubycons by the ram slots and a few smaller black caps that i cannot see any marking on. if it not the caps causing the problem them what is? i have enclosed 2 pics of the caps by the ram slots. maybe someone knows what the smaller caps are. to my knowledge this board has not been recapped. my brother gave it to me. he picked it up from the local refuse tip a couple of years back but has been ok up until recently.Attached FilesComment
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Re: Bad Caps Or Stability Problem
In what way is the system unstable?
I remember i had one Aopen board with freezing keyboard / mouse PS2 and USB ports esp when plugging in. Sounds and content on websites like gif images where still active, replaced the small caps for the ports and the system was back to normal operation.
Aopen used multiple brands of caps, The boards with KZE's and Panny's rarely have problems with the caps because those are good brands.
Other boards were populated with good Rubycon YXG caps and 3 crappy Lelon input caps ruined the stability.
(English is not my native language)Comment
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Re: Bad Caps Or Stability Problem
Those little black ones with the GL are G-Luxon.
- At least that's what I've concluded by seeing them use interchangeably with caps actually marked G-Luxon on different [but same model] boards.
I think they sometimes resort to "GL" instead of writing out their whole name.
Not good to see G-Luxon.
They are junk like the Lelon.
I have some brand new boards with some of those GL on them.
I've been meaning to pull some and check the ESR for cross-reference purposes when I have time.
.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
-
Comment
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Re: Bad Caps Or Stability Problem
A tired out Windows installation can certainly be unstable.
Most in my experience are simply slow... I often thought Microsoft embedded a NOP counter loop in the kernel. Every day after installation, the OS adds +1 to the counter loop which inserts a delay after every instruction. This would account for Windows getting slower, the longer it is installed.
In my commercial experience, a fresh XP/SP2 or SP3 installation is never unstable. The introduction of 3rd party software into the kernel ("do you want to reboot now?") can be the introduction of instability.Comment
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Re: Bad Caps Or Stability Problem
a fresh install makes little difference. the pc is unstable from the start simple as that. it is a pain in the neck. now where did i put my bloody big hammer LOLComment
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Re: Bad Caps Or Stability Problem
I see no mention of using a different power supply..Comment
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Re: Bad Caps Or Stability Problem
i have tested it and it passed. it was tested using a proper psu tester. i could try another psu to be on the safe side but i dont think it will be any differentComment
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Re: Bad Caps Or Stability Problem
I'm not aware of a proper PSU tester other than a scope and DVM.
The board is unstable with a variety of fresh operating systems, so it ain't software. A power supply swap will determine Yes or No, then the scope will show Why.Comment
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Re: Bad Caps Or Stability Problem
Oh they have one.Originally posted by bgavin
But I think it costs like $30,000.Mann-Made Global Warming.
- We should be more concerned about the Intellectual Climate.
-
Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
- Dr Seuss
-
You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
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Comment
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i ordered a lot of caps from digikey to repair my xboxs. one thing i ordered was 50NXA10MEFC5X11-ND caps and i think they are not polarized. will this cause any kind of a problem? i really don't want to order new caps just because of this. -
Hi guys, I have an HP model 15s-eq1040nl main DAOP5FMB6A0 REV:A with a caps/lock 5 long 3 short led flashing problem, I tried to remove the battery and program a new bios and when I restarted it immediately worked correctly, the pc turned on and loaded the operating system.
As soon as I turned off the pc and connected the battery, the problem reappeared... caps/lock 5 long 3 short led flashing again!
the battery was dead, i charged it and it works fine, but the pc won't turn on again.
What do you recommend me? Do I have to redo the bios or is there anything else to check?... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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I have an LG Plasma TV 60PM6700 for the past ~12 years.
In the last ~3-4 months I have been having some issues.- Problem: It started with random picture disappearing (sound still worked).
Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
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I have an audio device with two caps around an ic amp JRC2073. I replaced these two caps and the no audio fault remained, however by chance i shorted the exposed caps of these two with a finger each on one hand and got audio. My hand resistance was about 0.4mohn so i tried large resistor across instead and got audio too, why is this please? All the solder joints look and test good.
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