Re: Compaq Evo D510 SFF - worked 30 minutes after recapp and than stopped.
Gianni you are right.
The CPU Vcore voltage is OK, so the problem is elswhere on the board.
The power supply may have problem too. All its capacitors are Rubycon and look OK.
But the voltages are higher than normal. 5V is 5.8V, 12V is 13.7V.
I will measure all the voltages and will try to see which part of the scheme shuts down.
robofind
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Last Activity: 11-28-2012, 04:57 AM
Joined: 07-17-2008
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Re: CPU at 100% after RECAP
Here is what i found for description:
[url=http://www.intel.com/pressroom/kits/quadcore/images/2006.int.qua.txt.EN.13x18.jpg]This picture[/url] will give you an idea. Its computer generated, not real. Its for core quad. It gives an idea of the processor construction.
The processor's metal plate is made transparent and the two silicon chips (which are the processor itself) are visible. P4 is sigle chip however.
The "glue" compaund is between the chip and the plate and is not illustrated.Re: CPU at 100% after RECAP
Last edited by robofind; 07-28-2008, 04:22 AM.Leave a comment:
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Re: CPU at 100% after RECAP
Hi Gianni.
"National Chemi-Con" = "Nippon Chemi-Con"
Panasonic FJ/FL/FM or Samxon GC/GD are good too.
ZL and ZLH have smaller ESR than YXF. But if the board works correct - stay with YXF. Many solder/desolder operations tend to damage the board.
kc8adu means not the thermal paste / thermal grease between the processor and the heatsink. He means the thermal compaund used to "glue" the silicon chip of the processor to its metal plate. This metal plate is what contacts with the heatsink....Leave a comment:
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Re: CPU at 100% after RECAP
Hi Gianni.
Its best to see that the problem is solved.
For the power suply - at last, change not only the bad capacitor, but all that are the same. Since they may look good but to leak after some time.
With some boards I have this issue. Replaceng only the visualy bad capacitors. After some time other capacitors, that are the same, but were not changed got bad.Leave a comment:
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Re: CPU at 100% after RECAP
Hi Gianni.
Clear CMOS and verify all the settings are correct. Especially these for processor, memory and disk devices. After recaping the last ECS board it got "frozen" with default settings. So I changed them and it works OK - 3 months up to now.Leave a comment:
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Re: CPU at 100% after RECAP
Hi Gianni.
I am not a specialist in that field too, I am an radioamateur. I help to my friends like you do.
I think its the capacitors in the processor voltage regulation. Not these near the memory.
In my case, [url=https://www.badcaps.net/forum/showthread.php?t=5605]written here[/url] the board worked about 30 minutes, and then stopped.
In your case it at last works - slowly, but works.
I have recapped many old boards - AMD Duron, Intel P3, Intel Celeron.
And they all work fine.
But their...Leave a comment:
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Compaq Evo D510 SFF - worked 30 minutes after recapp and than stopped.
The computer is Compaq Evo D510 SFF, with motherboard spare part number 277977-001 (where SFF means Small Form Factor). The processor is P4 2GHz, on socket 478.
1. For many years the computer was worked fine without any problems.
2. One day is suddenly "freezes" and, after waiting some time, it is shut down from the power botton. And it no longer boots.
3. I tought "It is a semiconductor device - the capacitors do not fail so suddenly". But there were 13 bad capacitors, most of them in the processor core voltage regulator.
4. They were National... -
Re: CPU at 100% after RECAP
Rubicon MBZ or MCZ
Nichicon HN or HZ
National Chemi-Con KZG
is what must be used on that place of the board.
I think the processor is OK, but the voltage regulator on the board can not supply enough current to it.
Anyway you must solder on the board ONLY with all components removed. This includes processor, memory, Cmos battery, etc.
Do not recap with the original capacitirs. First measure their capacitance with C-meter or L/C-meter. They are failed because their leakage curent has gone high,...Last edited by robofind; 07-24-2008, 06:11 AM.Leave a comment:
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Re: CPU at 100% after RECAP
[b]Gianni[/b] Yes, this could be the problem.
When you change capacitors, the value of the new must be in +/- 20%.
So 470 / 330 = 1.42
It is 42% bigger then the original.
And what series of Rubicon you use?Re: CPU at 100% after RECAP
[b]Gianni[/b] Yes, this could be the problem.
When you change capacitors, the value of the new must be in +/- 20%.
So 470 / 330 = 1.42
It is 42% bigger then the original.
And what series of Rubicon you use?Re: CPU at 100% after RECAPLeave a comment:
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