> On 23 Jul 2023, at 20:58, George N. White III <gnw...@gmail.com> wrote: > > > > On Sun, Jul 23, 2023 at 12:20 PM Montague Bestes via users > <users@lists.fedoraproject.org <mailto:users@lists.fedoraproject.org>> wrote: >> I do stupid stuff once in awhile too, lol. Nice to be able to laugh about it. >> Watch out with vacuuming the motherboard though; I sucked up a few jumpers >> once doing that. > > Static electricity can also be a problem using vacuums instead of canned air. > For extreme situations I have used copper mesh with a ground wire over the > vacuum inlet. That would filter out jumpers, but then you have to figure out > where they came from, so take photos and make notes before attempting.
What I was taught do was use a vacuum and a soft haired paint brush. Lightly use the paint brush to loosen the dust and suck it up with the vacuum. Never touch the components with vacuum nozzle. Barry >> >> >> On Friday, July 21, 2023 at 05:54:16 AM EDT, ToddAndMargo via users >> <users@lists.fedoraproject.org <mailto:users@lists.fedoraproject.org>> wrote: >> >> >> On 7/19/23 01:02, Tim via users wrote: >> > Tim: >> >>> Or had the CMOS battery going flat? >> > >> > ToddAndMargo: >> >> Have not noticed my date and time messed up, but ... >> > >> > I've found that only when a battery was *really* bad that time may be >> > off. It could be sufficiently low to be a problem, and your clock >> > still keeps time. Especially if your PC supplies mains-derived power >> > to the BIOS/UEFI when running, and the battery is a back-up rather than >> > the only supply for it. >> > >> > There's an often stated claim the BIOSs are designed to run slow when >> > the power is low, but I don't have faith in that. I think people are >> > trying to fit their own explanation into something that happened by >> > accident. It may well be that some do that, simply by virtue of how >> > the circuit behaves rather than being a deliberate effect, but I've got >> > PCs which kept very good time with a near dead battery (they are >> > designed to be a really low power consumption device). When their >> > batteries did die, the clocks simply resetted to some distant date in >> > the past, and drive parameters went haywire. >> > >> > If motherboard manufacturers wanted to make it obvious that you needed >> > to change a battery, they could have designed the BIOS with a voltage >> > reading that any OS could easily read without arcane knowledge, and >> > your OS could pop up a warning which told you what was needed. >> > >> > Expecting the masses of computer illiterate to know that the clock >> > being off might mean you need to change a battery, rather than them >> > just writing the behaviour off as yet another Windows setting screw-up >> > is a bit of an ask. And it's a hidden effect by so many systems which >> > continuously auto-correct the clock. >> > >> >> I do change a lot of CMOS batteries for my customers. >> > >> > Bearing in mind that many of those coin batteries have an expected >> > working lifespan of about 3 years (that's less than their shelf-life), >> > it may be worth simply replacing them that often without trying to >> > squeeze the last morsels of power out of them until things go obviously >> > wrong. And modern batteries have worse chemistry than older batteries >> > (less pollutant, by a fractional amount, but far more prone to leaking >> > and causing corrosive damage). >> > >> > I give my PCs a vacuum once or twice a year, and I write a maintenance >> > log in texta inside the lid (last cleaned so-and-so-date, new battery, >> > etc). >> > >> > I've got a very old iMac sitting next to me that needs a new coin >> > battery put in it, but thanks to idiotic design for cosmetics rather >> > than practicality, you have to remove every single bit of hardware from >> > the casing to get to the battery at the back of everything (lots of >> > interconnected boards and devices). Why they couldn't have mounted it >> > on the other side of the board I don't know. I'm tempted to use a hole >> > saw on the cabinet to make replacing it much easier. That, or I'll >> > solder in a battery holder on fly leads and put it in a much more >> > sensible place. >> >> Wonderful write up! >> >> I tested it with an extended hard power >> off (outlet strip). It worked fine. >> >> So, it must have been something stupid I did. >> >> >> :'( >> _______________________________________________ >> users mailing list -- users@lists.fedoraproject.org >> <mailto:users@lists.fedoraproject.org> >> To unsubscribe send an email to users-le...@lists.fedoraproject.org >> <mailto:users-le...@lists.fedoraproject.org> >> Fedora Code of Conduct: >> https://docs.fedoraproject.org/en-US/project/code-of-conduct/ >> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines >> List Archives: >> https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org >> Do not reply to spam, report it: >> https://pagure.io/fedora-infrastructure/new_issue >> _______________________________________________ >> users mailing list -- users@lists.fedoraproject.org >> <mailto:users@lists.fedoraproject.org> >> To unsubscribe send an email to users-le...@lists.fedoraproject.org >> <mailto:users-le...@lists.fedoraproject.org> >> Fedora Code of Conduct: >> https://docs.fedoraproject.org/en-US/project/code-of-conduct/ >> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines >> List Archives: >> https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org >> Do not reply to spam, report it: >> https://pagure.io/fedora-infrastructure/new_issue > -- > George N. White III > > _______________________________________________ > users mailing list -- users@lists.fedoraproject.org > <mailto:users@lists.fedoraproject.org> > To unsubscribe send an email to users-le...@lists.fedoraproject.org > <mailto:users-le...@lists.fedoraproject.org> > Fedora Code of Conduct: > https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: > https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org > Do not reply to spam, report it: > https://pagure.io/fedora-infrastructure/new_issue
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