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05-12-2012, 10:23 AM
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#1 |
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Member
Join Date: Jul 2010
City & State: UK
Posts: 42
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Which cap to replace kzg - Biostar AF4ST-A9
I have Biostar NF4st-A9 socket 939 motherboard which our kids use.
Its been working great for many years. Recently when using, the PC just freezes randomly which then requires the power to be switched off to reboot. Thought originally that the PSU was failing so tried with a spare PSU. When replacing the PSU i did notice that one of the KZG 3300uf 6.3v caps by the CPU looked very slightly domed on top. Tried the spare good PSU to test and the same problem is there. Pretty sure now that the caps near the cpu maybe bad. The motherboard also has some 1500uf 16v KZG caps which appear to be ok. I would be grateful for some advice on which caps to use to replace the 5 - 3300uf 6.3v and 3 - 1500uf 16v KZG caps. Basically looking for good quality caps to be purchased from badcaps.net to be shipped to UK. I have done some re-caps before and do have the esrmicro v4 for testing when the old caps are removed. Sorry about the poor photo. The domed cap is not shown as its the 5th cap which didn't show on the photo. Many thanks |
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05-12-2012, 10:44 AM
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#2 |
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Slow Learner
Join Date: Dec 2010
City & State: Lancashire UK
Posts: 4,657
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Re: Which cap to replace kzg - Biostar AF4ST-A9
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05-12-2012, 11:02 AM
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#3 |
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Member
Join Date: Jul 2010
City & State: UK
Posts: 42
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Re: Which cap to replace kzg - Biostar AF4ST-A9
OK
I was hoping for advice with regards to series, similar esr and size. Any advice would be gratefully appreciated. I also would like to buy from badcaps.net to show my support |
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05-12-2012, 06:43 PM
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#4 | |
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Badcaps Veteran
Join Date: Apr 2010
City & State: Canada
Posts: 8,078
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Re: Which cap to replace kzg - Biostar AF4ST-A9
Quote:
http://www.badcaps.net/store/product...roducts_id=142 Same for 1500uF 16V http://www.badcaps.net/store/product...roducts_id=139 HZ easily exceeds KZG specs as per http://www.opamp-electronics.com/cat...-Datasheet.pdf http://www.partsconnexion.com/PDF/e-hz.pdf
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05-13-2012, 02:06 AM
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#5 | |
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Member
Join Date: Jul 2010
City & State: UK
Posts: 42
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Re: Which cap to replace kzg - Biostar AF4ST-A9
Quote:
Did loads of searching and reading on posts last night but was still a little unsure. I have placed order for the HZ series ones recommended from badcaps.net Must say the delivery cost seems very good for international post. Thanks for your time in helping - Very much appreciated |
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05-13-2012, 02:27 AM
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#6 |
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Unknown
Join Date: Sep 2009
City & State: North Coast, NSW
My Country: Australia
Line Voltage: 240V 50Hz
I'm a: Professional Tech
Posts: 3,371
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Re: Which cap to replace kzg - Biostar AF4ST-A9
Just remember that all KZG caps on the board should be replaced. they often go bad with no visible signs.
__________________
I love putting bad caps and flat batteries in fire and watching them explode!! Main PC: Core i5 660 3.33GHz, Gigabyte GA-P55-UD3R, 4GB Kingston DDR3 1333, 750GB WD HDD, Sony Optiarc DVD RW, nVidia GTX295 1760MB, Antec 1200 Case, Delta DPS-750CB 750W PSU, Hauppauge TV Tuner, Windows XP Pro. Main Laptop: Lenovo Thinkpad T60: Core 2 T2500 2GHz, 2GB DDR2, 80GB HDD, DVD RW, Intel Graphics, Windows XP Pro. 2nd Laptop: Toshiba Satellite A200: Core Duo 1.73GHz, 2GB DDR2, 60GB HDD, DVD RW, nVidia GF Go 7300 Graphics, OpenSUSE 12.2, Fan Mod |
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05-25-2012, 02:31 PM
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#7 |
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Member
Join Date: Jul 2010
City & State: UK
Posts: 42
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Re: Which cap to replace kzg - Biostar AF4ST-A9
The new HZ series caps arrived a couple of days ago from badcaps. From order to delivery to the UK was 8 days. Very happy with ordering from badcaps.
I took the old KZG caps out. I wanted to test all the caps removed. Unfortuntatly the vented cap was difficult and one of the legs broke. I was therefore unable to test this cap. The other removed caps all tested OK with the esrmicro. Also had a few problems with unblocking the holes on the motherboard. I was using a 60W soldering iron but still struggled a little. Eventually i was succeful with a new solder sucker and dental tooth picks. The new caps are all in now. So far the Biostar NF4st-A9 socket 939 motherboard seems to be working with no problems. I have asked the kids to start gaming especially the ones which use to cause problems. So far no problems encounted. Hopefully the bloated cap was the one which caused the problems but now with replacing all the KZC caps everything will be ok. Thanks for the posts and recommendation for the HZ series caps |
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05-25-2012, 05:21 PM
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#8 |
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Radioactive
Join Date: Aug 2007
City & State: tehas
My Country: US
Line Voltage: 120VAC 60Hz
I'm a: Professional Tech
Posts: 1,983
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Re: Which cap to replace kzg - Biostar AF4ST-A9
KGZ's tend to have bad seals, so when the bloating process occurs, they just vent the gas through the bad seals, and they do not show any signs of bloating
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