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Changing Caps?
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ncdave
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PostPosted: Tue Nov 04, 2003 4:32 am    Post subject: Reply with quote

Well, Abit has had the first of my bad BP6 motherboards for more than 2 weeks, and they still haven't shipped a repaired replacement, and they aren't answering my email. So, getting desperate, I decided to recap one of the motherboards myself, using the replacement capacitors which Jackcon sent me.

It went pretty smoothly except for three problems:

Problem #1 (solved): I had trouble getting the solder out of the 48 tiny holes on the motherboard, after removing the 24 bad capacitors. For your amusement, and with apologies to Tim "The Toolman" Taylor, here are a couple of photos of my solution:
http://www.burtonsys.com/BP6_desoldering1.jpg
http://www.burtonsys.com/BP6_desoldering2.jpg
Yes, they are hooked "in series," with the bags removed for extra power. They made a most impressive roar, lemme tell you! Note that the power cords snake off in different directions, because I plugged them into different circuits, so that they wouldn't trip a breaker.

Problem #2 (not solved): After I'd already removed about half of the bad capacitors, I realized that the two small inductors, L17 and L18, are also toasted. I don't know whether or not they are still functional, but they sure look bad. Here are some pictures of them:
http://www.burtonsys.com/BP6_bad_coils1.jpg (before I removed the caps or noticed the inductor problem)
http://www.burtonsys.com/BP6_bad_coils2.jpg (after removing the bad capacitors)
http://www.burtonsys.com/BP6_bad_coils3.jpg (another view after removing the bad capacitors)
I don't have anything to replace them with, so I left them alone. If I'd noticed them before starting on this project, I'd have left the board alone and RMA'd it to Abit to worry about. I doubt that they'll take it back, now. Sad

What do ya'all think? Are L17 and L18 gonners? Any idea where I can get replacements?

Problem #3 (the big one): It doesn't work. After replacing the capacitors, I plugged in a couple of sticks of memory, a pair of CPUs, video card, monitor, power supply, and keyboard. Then I turned on the power supply, and momentarily jumpered the power switch connector. The CPU fans started up, but nothing else happened. No POST at all. So I hooked up a speaker to check for beep codes, and was rewarded with a European police siren: Beep, Boop, Beep, Boop, etc.. So I powered down, removed CPU #2, and powered up again: instant siren (no change). So I powered down, and removed the other CPU, and tried powering it up with no CPU: the siren again (no change).

Ideas, anyone?

-Dave
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Topcat
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PostPosted: Tue Nov 04, 2003 8:47 am    Post subject: Reply with quote

Dave,

I don't be mad, but I was on the floor chuckling at the desoldering 'rig'.............. That's the best stroke of \"Macgyverism\" I've seen in a LONG time!!! I NEVER use a solder sucker on a board, but rather a needle pick to remove the solder, it's safer for the board. I'll take some pics and post them for ya.

As far as coils, I have a BP6 I hosed a long time ago I've been bilking parts off of, if u need the coils, let me know, I'll be happy to send them to you. It still has all the coils in it.

As far as it working, if it is beeping at you, thats a really good sign actually... That means it is trying, and things are for the most part getting power. find out what beep code it is giving, and that will tell you where the malfuntion it is. More than likely, the burt coils have a hand in the problems...

Let me know if you want the coils!! Twisted Evil
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ncdave
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PostPosted: Tue Nov 04, 2003 11:08 am    Post subject: Reply with quote

Oh, thank you, thank you, thank you! Yes, I do want the two small coils (L17 and L18).

As for the beeping... that's what I thought, too, at first: that it must be BIOS beep codes. But it isn't. It is some sort of hardware-generated alarm indicating that the CPUs aren't running.
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ncdave
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PostPosted: Sat Nov 08, 2003 2:13 am    Post subject: Reply with quote

Tomcat, your coils (and the replacement caps that Jackcon sent me) fixed my motherboard!! THANK YOU!!! Very Happy
-Dave
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Topcat
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PostPosted: Sun Nov 09, 2003 12:17 am    Post subject: Reply with quote

KILLER BEANS!! Smile Glad I saved that old board, many times it nearly got pitched, but the pack rat that I am always told myself I'll need something off it someday...

Glad it worked!!
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ncdave
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PostPosted: Wed Nov 26, 2003 11:02 am    Post subject: Reply with quote

Well, I was wrong. I didn't believe that the techs at Abit would replace only some of the bad caps on a motherboard. But I just (finally!) got back the RMA replacement for that BP6 that I sent 'em, and ten of its 1500uF caps are still Tayeh, the other two are Teapo. So it sure looks like they just pulled out a couple of visibly bad Tayeh caps and replaced them with Teapo caps. Sheesh!

EC10 is just 100 uF, too.

The 1000uF caps are all gold-writing-on-black Teapos.

Big waste of time and shipping. I shoulda recapped it myself.
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ncdave
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PostPosted: Mon Jan 26, 2004 6:59 pm    Post subject: Reply with quote

Well, in the interest of fairness, I should mention that the RMA replacement BP6 which Abit sent me does seem to work okay, in spite of the Tayeh caps. I still would feel a lot better if they'd replaced 'em, but (for now, anyhow) it runs fine.
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