Greetings Kevin, I have a very good assortment of resistors, "Through Hole" I assume is what they ask for, you will need some tiny insulation tubes to keep it from shorting out, I can mail all of this to you, (resistors are about 2 cents so no worries, I think I can afford the postage also, where would I send it to? you can reply directly if address is an issue in the group..

Greg Manning

On Wed, Oct 27, 2021 at 6:17 PM Kevin McGregor kevin.a.mcgregor@gmail.com wrote:

Hi all,

I have a SuperMicro A1SRI-2758F motherboard which appears to have now died. I've read that it's because of a bug in the Intel Atom C2000-series chips of a certain vintage.

I've also read that there is a DIY fix involving a bit of soldering and a 220 ohm resistor. See https://www.youtube.com/watch?v=BPKFC2HBtvA. Can anyone provide the resistor? And maybe some soldering help? :-) I do have a soldering iron, but I haven't used it for ages.

Kevin _______________________________________________ Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable

I have resistors... somewhere. The soldering bit is really trivial, in fact soldering isn't needed at all if you have any old speaker or cd-rom audio jumper cables (or similar).

First, here's a high-res photo of your board: https://www.pc-canada.com/dd2/img/item/B-Large/M/MBD-A1SRI-2758F-O.jpg

Then, the pinout of JTPM1 (next to the leftmost PCIe slot, if the back panel is away from you) can be found on page 2-23 (aka PDF page 43) of https://www.supermicro.com/manuals/motherboard/Atom_on-chip/MNL-1555.pdf

Now find one old jumper cables of almost any size AS LONG AS either there is no "key" on the cable header OR it just happens to work pinout-wise, OR two old cables you're willing to mangle.

If you're mangling the cables (well, the headers), use wire cutters or even a knife to chop off almost as much as you need off, then use a file or razor knife to get rid of the excess plastic. Don't try to make the cut too exact, you will split the plastic that you need to hold the pin in place. (Ask me how I know...)

You now have two female-to-female extension cords. Plug the resistor (wherever you get it) into the extension cords. Plug the other end of the cords into the appropriate pins on the m/b header - probably following the instructions in the video, which I did not re-watch, but the pinout appears to be standard in which case you want pins #1 (bottom-right, following the same orientation as above, there's a slight thickening of the white line on the m/b silkscreening as a guide) and #9 (4 pins up from pin 1 on the same side).

No soldering required, just careful knife work.

If you don't have any old jumper cables, I have a large quantity you can massacre :-). They're all at my parents', but I need to drop off dad's weed whacker someday soon anyway... and you and they are both on the south side of the city, not that hard to drop off some cables. Or you could come help rack the new server sometime next week :-D ...actually, do you have any experience mounting rack servers? I know you work with them, but that's not necessarily the same thing. And I'm pretty sure you're vaccinated, which is also a factor with _some_ of our other board members :-( . [If you're not available / able / willing, Brad's already my backup choice. But I'd prefer help who know their way around a datacenter.]

CAVEAT: the pin dimensions on JTPM1 *might* be too big to fit into any particular old random jumper cable; audio cables and (e.g.) PC power button cables were not always the same size/spacing.

-Adam

(or only one, if the pin spacing happens to work)

On 2021-10-27 18:15, Kevin McGregor wrote:

Hi all,

I have a SuperMicro A1SRI-2758F motherboard which appears to have now died. I've read that it's because of a bug in the Intel Atom C2000-series chips of a certain vintage.

I've also read that there is a DIY fix involving a bit of soldering and a 220 ohm resistor. See https://www.youtube.com/watch?v=BPKFC2HBtvA. Can anyone provide the resistor? And maybe some soldering help? :-) I do have a soldering iron, but I haven't used it for ages.

Kevin _______________________________________________ Roundtable mailing list Roundtable@muug.ca https://muug.ca/mailman/listinfo/roundtable