I tried searchin info on the old capacitors. Here is a picture.

I couldn't even find brand behind that logo when searched online in this list http://info.electronicwerkstatt.de/bereiche/b … uteile/ic_logo/
On the other side of the capacitor it just says words "LOW E.S.R"
Anyone knows what brand they are and if there is a spec sheet?

Well, if it says low ESR, you should simply get 6.5V 1000uF low ESR caps from a reputable brand (Nichicon, Panasonic etc).

You can also test the ESR with some of the better MK328 transistor testers. Mine does that, you can find a short review of it on my channel (https://youtu.be/L7HrLqSRxgQ). They are available on eBay for 5-20 bucks, depending on their features and if they come in a case or not.

They do not compare to professional ESR meters and you CAN'T measure parts in circuit, so you have to desolder them first. But it is good to get a rough idea of the ESR of the caps. Also those devices measure the actual capacity of the part. Plus you can test resistors, transistors, diodes and several other parts.

root42 wrote:

Well, if it says low ESR, you should simply get 6.5V 1000uF low ESR caps from a reputable brand (Nichicon, Panasonic etc).

You can also test the ESR with some of the better MK328 transistor testers. Mine does that, you can find a short review of it on my channel. They are available on eBay for 5-20 bucks, depending on their features and if they come in a case or not.

They do not compare to professional ESR meters and you CAN'T measure parts in circuit, so you have to desolder them first. But it is good to get a rough idea of the ESR of the caps. Also those devices measure the actual capacity of the part. Plus you can test resistors, transistors, diodes and several other parts.

Wouldn't the ESR have changed during those 20 years that the old parts have been on that motherboard? I was just thinking that even the caps that are not bulging can't be in as good condition as they were when they were new.

Yes, they will certainly have degraded. With a MK328 tester you can see how much the capacity has changed. And also if the ESR has gone up. Low ESR will have a fraction of an Ohm if good. Normal tantalums or higher ESR will show 2-3 Ohms, if I remember correctly.

Baoran wrote:

I tried searchin info on the old capacitors. Here is a picture. […]
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I tried searchin info on the old capacitors. Here is a picture.

cap1.jpg

I couldn't even find brand behind that logo when searched online in this list http://info.electronicwerkstatt.de/bereiche/b … uteile/ic_logo/
On the other side of the capacitor it just says words "LOW E.S.R"
Anyone knows what brand they are and if there is a spec sheet?

I believe they're Ark caps, a Taiwanese brand.
http://www.arktwn.com.tw/html/table.htm

The combination of capacitance, package format, and rated temperature makes me think they're this series.
http://www.arktwn.com.tw/table/GR.htm

That would make them GP caps. Pretty much anything, including those Samwha caps, should work.