Haha yeah, i confused myself for sure with this one. Also did the stupid thing to diagnosing two boards at the same time on the bench, the other one being a p5kpl-cm with the same socket, but different supported CPUs. In all swapping madness i must have confused them..
Funny side note, the cpu on the picture is the one that was sitting in the bag with the "working" note on it. I must have over the years yanked that cpu out, and just popped in another one to protect the socket pins or some reason like that. who knows.
Oh also, another note the P5KPL-CM with the bulging...
crosswinds
Member
Last Activity: 04-27-2024, 04:07 PM
Joined: 10-20-2016
Location: Nordic
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Alright everyone,
You wont believe this.
I pulled out another CPU from the collection. Number three tested on this board. The board booted right up and is currently running memtest.
I tried with so many combinations of spare hardware. I also cannot believe I have two flaky CPUs.. All of which has been bagged in a anti-static bag by me and also marked as "working".
There might be confusion if there is a BIOS update and one of these are not supported without it, ofcourse. Need to dig in to that.
Well some lesson learned on...Leave a comment:
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The only ones that are not around sound circuity are these ones.
You think they can cause this?Leave a comment:
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Hey,
Thanks for all the info here!
Even though it killed my hopes for the mosfet to be the culprit. I was really hoping for it. But I see now in the picture what you mean.
Did not even think this was a thing to do it as you said, but it sure do look like it.
Back to the drawing board with this one. Eventhough I dont really know what the next step should beLeave a comment:
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Great tip,Thanks for it!
I did a quick check for any ceramics in the near viscinity of the transistor. But nothing there.
Will need to trace it out thoroughly to be sure though....Leave a comment:
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Alright. I had a small development with this.
Armed with very little knowledge about motherboard component level troubleshooting, some time and a multimeter. I started to randomly check the transistors on the board.
since we have c1 memory post code, I started around the RAM slots. I found one that is shorted between Gate - Source, which im pretty sure is not supposed to be?
Will need to pull it to really confirm. But i dont think something else in the circuit might cause this gate-source short symptom? Am i barking up the wrong tree?
Please see the...Leave a comment:
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Hello!
Thanks all for your tips!
So, I received caps to both boards today.
Soldered all in today on this one and as suspected, Nothing changed.
However, I did also get a new post-card and it is consistently stopping at C1 with the DRAM LED on the postcard lit. So not sure if the other postcards was flaky or something changed with new caps. The latter is doubtful though.
C1 is memory from what i can gather. And i tried 3 different sticks, always the same code.
Postcodes are as follow after powerup: 00 -> FF ->CF ->C0...Leave a comment:
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Hello,
Thanks for your input!
I agree that its a long shot with the caps.
However, it was first resort as I know it worked before being stored, im the original owner of the board, and it has always been well taken care of. So i figured this will be one of the things that actually time takes a toll on the shelf.
This combined with that i have another asus board, same socket, around same years,however with more hours on, that has alot of bulging caps.
So for your questions:
It was stored in a static bag on a shelf in the office. Not like a...Leave a comment:
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Great!
Thanks for your help with this.
What do you think about the polymers i linked? Would those be valid for the CPU?Leave a comment:
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Yeap, the polymers most likely are good then. Probably the others also. I jumped to quick on the caps in this case
However, it was the only thing i could think of that would die on the "shelf"
I picked panasonic FR for the electroytics on the list, i guess that would be fine?
And the replacements for the polymers i got to this [url]https://www.mouser.se/ProductDetail/667-4SEPC560MX[/url]https://Yeap, the polymers most like... i could thinkLeave a comment:
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Hello! So I pulled the capacitors out of circuit.
Measured ESR and the capacitance on all of them. On the ESR meter, all of them but 3 measured 00 on the meter, the other three was 0.01-0.02. This is with the "EVB" ESR meter bought a couple of years back. Not sure if its valid for these types of caps though.
However, according to those readings it does look like all of them had good ESR? Thats a bit unfortunate since I was hoping the issue was caps.
Though, capacitance measurements was a little bit more "all over the place" with:
...Leave a comment:
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ALright so with that it looks like it is a Fujitsu cap, Series 691, 560uF capacitance and 4V. Does that sound reasonable?
I do not thing i can get hold of this exact series or manufacturer. But I can get hold of Panasonic caps for example.
Can all the other ones be changed to polymer caps? Any pitfalls here in term of ESR and so?Leave a comment:
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Thanks for your input!
The most difficult ones to identify values for are the ones with red markings on. I do suspect those might be polymer, but not sure. Not really finding any sources online for these markings.
Any clues on those?Leave a comment:
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Assistance with identifying replacement caps on ASUS P5VDZ-MX
Hello,
So, pulled a motherboard out from storage, was working when put away, wont post when I took it out of storage today.
Since it was working, and it looks to be essentially time that killed it I figured its a good idea to replace the caps before digging further.
Looks to be only good quality caps on this board, so might not be the issue. But it is closing in on 20 years now so, wont hurt i guess
Its a ASUS P5VDZ-MX board.
I would really appreciate some assistance on what the best replacement caps would be for these:
Panasonic(M)... -
Re: Amiga 500 PSU
Actually, the PSU is fully functional.
However I plan to use it quite a bit more now so this is a precautionary measure
All the caps actually read good ESR so that's quite surprising after all these years.
But I hope this will prolong the life of the psu...Leave a comment:
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Re: Amiga 500 PSU
Great! Thanks.
Thank you! No wonder why I didn't find the right “form factor” hehe...Leave a comment:
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Amiga 500 PSU
Hello!
So i am replacing all the caps in an old Amiga 500 PSU.
Now, im not quite sure about the main 400v 47uF cap.
The one my supplier had that was exact in the values, and closest in dimension is a Panasonic EEUEE2G470S
Now, this one have very thin legs, and the original have quite "beefy" Please see this image:
[url]https://ibb.co/cfB9Pb[/url]
Can i still use it, you think?https://Hello!<br /> <br /> So i a...about the main... -
Re: Input on Nichicon PL(M)
This is for a Tektronix TLA704 logic analyzer, and its not for the PSU.
It is for the acquisition-modules.
They have:
x15 35v 150uF Nichicon PL(M) (Safe to replace with Panasonic FR?
x7 16v 470uf Nichicon PY(M) (Safe to replace with Panasonic FC?)Last edited by crosswinds; 08-12-2017, 11:18 AM.Leave a comment:
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Input on Nichicon PL(M)
Hello!
So, i was just opening up an older Logic analyzer, and discovered that its build with above mentioned caps..
I had MUCH problem with PF(M) caps before. Are these as bad or should i let them be? -
Re: Lathe digital readout
Hello again!
Success! The unit is now working great again.
Thank you all for your help and input.
Sorry, i do not have any picture of the unit.Leave a comment:
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