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Old Yesterday, 11:58 AM   #21
delide
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Default Re: Killed my Asus A7V266-E? Need advice

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Originally Posted by momaka View Post

Nice!
Come to think of it, that was 18 years ago! Where did time fly?! (I feel old for saying that now.)

My first ever self-built PC was in late 2003, I think (or was it 2004, I can't remember.) Also an AMD/socket 462 with a cheapo Duron 1.4 GHz. But I used it proudly for about 3 years until the PSU became unstable. After this, I've moved onto different PCs, but still kept that PC as well. Many years later, I fully recapped the motherboard, as it was a beautiful red Jetway, but littered with crappy GSC caps. I posted about it here:
https://www.badcaps.net/forum/showth...ghlight=Jetway
Eventually, I also found an Athlon XP 2500+ for cheap, along with fixing up a Radeon 9700 video card. Back in the days, hardware like that seemed like a dream. But many years later, these things cost me barely anything on eBay... though now it seems old "retro" PC stuff (like high-end AGP cards) are climbing back up in value. So maybe a good thing I saved it.
Yes, time absolutely flies, really feel that both we human and the hardwares could use much longer life span!

Your recapped board looks really nice! I will study that thread carefully, when current trouble with mine finally go away.
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Old Yesterday, 01:27 PM   #22
delide
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Default Re: Killed my Asus A7V266-E? Need advice

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Originally Posted by delide View Post
By the way I just noticed an other problem, due to handling of the board lately, the spacing of the top of 2 replaced caps noticeably changed/reduced compared to my photo from the weekend, I've attached a comparison. The solder joints are all solid, so the difference must be caused by the legs being pulled out from the cap slightly. I do not think I was that heavy handed, probably one of the cap was a bit loose already.

I think I'm getting a bit paranoid here, tested with remaining cap, the legs are very strong. There should other reasons that the caps appear to be tilted closer now.
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Old Yesterday, 02:30 PM   #23
ChaosLegionnaire
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Default Re: Killed my Asus A7V266-E? Need advice

what is the voltage of the cmos battery? considering the age of the board, the cmos battery could have gotten weak from all those years in storage. a weak cmos battery is known for causing boot & post problems on motherboards and clearing cmos sometimes alleviates the problem albeit temporarily.

if it still persists even after replacing the cmos battery, replace all the ost caps on the board. i had an asus p4c800 (875p chipset board for the intel pentium 4 platform) board which also had boot & post problems similar to yours, requiring cmos clearing to get it to start and post. it was a boardful of ost caps. after i got rid of all the ost caps scattered around the board for general filtering, the problems disappeared.

considering the age of the board and the caps (nearly 20 years old now) and the dubious nature of the caps, u can try replacing them to see if it fixes the problem. i dont think running a board with 20 year old junk caps is a good idea here anyway...
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Old Yesterday, 05:03 PM   #24
delide
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Default Re: Killed my Asus A7V266-E? Need advice

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Originally Posted by ChaosLegionnaire View Post
what is the voltage of the cmos battery? considering the age of the board, the cmos battery could have gotten weak from all those years in storage. a weak cmos battery is known for causing boot & post problems on motherboards and clearing cmos sometimes alleviates the problem albeit temporarily.

if it still persists even after replacing the cmos battery, replace all the ost caps on the board. i had an asus p4c800 (875p chipset board for the intel pentium 4 platform) board which also had boot & post problems similar to yours, requiring cmos clearing to get it to start and post. it was a boardful of ost caps. after i got rid of all the ost caps scattered around the board for general filtering, the problems disappeared.

considering the age of the board and the caps (nearly 20 years old now) and the dubious nature of the caps, u can try replacing them to see if it fixes the problem. i dont think running a board with 20 year old junk caps is a good idea here anyway...
Yes, it's still the original battery but it still has 3.1V! I measured it both on and off board, it's the same. It should still have some years left.

This time the boot problem first reappeared after I left it off(onboard power LED still on) for more than 24 hours, all previous boots was always OK. I think I might not have fully cleared the CMOS last time, as the manual just isn't clear at all, now I have left the jumper closed for long enough time. I shall test again on this Sunday, it's really strange.

Before the recap there is no issue at all, but thanks for your advice, I will indeed recap the entire board. Since I have 2 boards now, I will first try to figure out which board still work fine, probably I will spare the working board for now, as I'm not fully ready yet. If both works then it would be ideal, I will then just recap the unused board, I can also be sure about the success or failure of my complete recap.

Last edited by delide; Yesterday at 05:05 PM..
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Old Yesterday, 10:08 PM   #25
momaka
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Default Re: Killed my Asus A7V266-E? Need advice

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This time the boot problem first reappeared after I left it off(onboard power LED still on) for more than 24 hours, all previous boots was always OK.
I'm starting to see a pattern here:
The motherboard boots OK when warm, but has trouble when cold. That's a very common symptom with bad caps. Of course, the issue could also be a bad solder joint somewhere, bad contacts in the CPU and/or RAM, or bad BGA chip. The last one is very unlikely, given you have a VIA chipset, and those just simply don't go bad. Bad contact in the CPU and RAM can be tested by removing the RAM and CPU a few times... but you already fitted the board with a new CPU when the old one burned, so I don't imagine that or the RAM as being the issue. That leaves either bad solder joints on the new caps (I doubt it, I looked at your work, and like I said, it doesn't seem bad in any way - I won't lie, it's not pro level, but it's OK adequate) or more bad caps left that just simply don't appear to be bad (those OST caps by the RAM slots and AGP connector should be the first to go.)

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I think I'm getting a bit paranoid here, tested with remaining cap, the legs are very strong. There should other reasons that the caps appear to be tilted closer now.
Yup.
Those caps are probably more than fine.
Sometimes I also happen to be a little less than "gentle" with some of my motherboard too. I've bent quite a number of caps a little like your example above. It's never caused any problem and probably never will. It takes a lot of force to pull a lead out of a cap. Usually pulling on a cap while its very hot (for example, due to being unsoldered at the bottom with a soldering iron) is one of the easiest way to pull a lead out and damage it. But even that is not so easy to do. You'd have to be completely reckless to do that.
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Old Today, 08:02 AM   #26
delide
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Default Re: Killed my Asus A7V266-E? Need advice

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Originally Posted by momaka View Post
I'm starting to see a pattern here:
The motherboard boots OK when warm, but has trouble when cold. That's a very common symptom with bad caps. Of course, the issue could also be a bad solder joint somewhere, bad contacts in the CPU and/or RAM, or bad BGA chip. The last one is very unlikely, given you have a VIA chipset, and those just simply don't go bad. Bad contact in the CPU and RAM can be tested by removing the RAM and CPU a few times... but you already fitted the board with a new CPU when the old one burned, so I don't imagine that or the RAM as being the issue. That leaves either bad solder joints on the new caps (I doubt it, I looked at your work, and like I said, it doesn't seem bad in any way - I won't lie, it's not pro level, but it's OK adequate) or more bad caps left that just simply don't appear to be bad (those OST caps by the RAM slots and AGP connector should be the first to go.)
Thanks for your reply! I did leave it off over night the first day though, it was still OK in the next morning, so I thought everything was fine. Maybe it was not long enough, I will keep it off for more than 24 hours again and see how it goes. Next I will recap one of my boards completely then. It's very reassuring to read what opinion about my soldering And I will work to get better.

Quote:
Originally Posted by momaka View Post
Yup.
Those caps are probably more than fine.
Sometimes I also happen to be a little less than "gentle" with some of my motherboard too. I've bent quite a number of caps a little like your example above. It's never caused any problem and probably never will. It takes a lot of force to pull a lead out of a cap. Usually pulling on a cap while its very hot (for example, due to being unsoldered at the bottom with a soldering iron) is one of the easiest way to pull a lead out and damage it. But even that is not so easy to do. You'd have to be completely reckless to do that.
Thanks! That's very reassuring to know too! Thought I was quite gentle, but the photo really shows otherwise

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