Archived from groups: alt.comp.periphs.mainboard.asus (
More info?)
thanks for you help Paul
the problem was that the motherboard was not getting a ground ,not being
assemble properly using washers underneath the screws
"Paul" <nospam@needed.com> wrote in message
news:nospam-1011040435590001@192.168.1.177...
> In article <1Ibkd.35777$ak3.1265531@wagner.videotron.net>, "Guy1"
> <outaouais30@yahoo.com> wrote:
>
>> battery doesn't seem to old bios settings evry time the there is a power
>> lost I have to reset the cpu speed and the hour , I have changed the
>> batterie with out any success anybody ever had this problem or knows a
>> solution
>
> That can happen, if you cleared the CMOS while +5VSB was still being
> applied to the board. ("Clear RTC RAM" in the manual.) Before clearing
> the CMOS, the green LED on the board should not be lit. The safest way
> to ensure that +5VSB is not on the board, is to unplug the computer
> before doing the clear CMOS procedure.
>
> If you got the board used from someone else, they could have done
> that to the board. The part that can get damaged, is a dual diode
> with "K45" printed on it in tiny letters. Typically the diode will
> be near the CMOS battery, but it doesn't have to be there. It could
> be anywhere. Either that dual diode (it has three legs), or a
> copper track feeding the diode, could be damaged.
>
> The BAS40-05 and BAS40W-05, are the nearest thing to a substitute
> I can find. The -05 part selects the "common cathode" diode
> configuration. You can buy these from Digikey in the states. The
> difference between these two, is the shape of the package. Match
> the dimensions in the datasheets, to the part on the motherboard,
> for best fit.
>
>
http://www.diodes.com/tracker/pdftracker.php?page=http://www.diodes.com/product_catalog/search.php&ds=ds11006.pdf
>
http://www.diodes.com/tracker/pdftracker.php?page=http://www.diodes.com/product_catalog/search.php&ds=ds30114.pdf
>
> But the trick will be, finding the dual diode on the board.
> Using the picture in the manual, I cannot identify a part that
> is likely to be the one. Reading the "K45" on top of the part,
> does require use of a magnifying glass. This repair will also
> test your soldering skills, and will be tougher to do than using
> two soldering irons to remove a surface mount resistor or capacitor.
>
> I don't know if Asus will repair this under warranty or not, or whether
> they might have a standard repair charge to fix it. As far as I'm
> concerned, this "bug" in the hardware design is unacceptable, but
> I guess the method they use is cheaper than doing it right.
>
> HTH,
> Paul
Facebook
Twitter
Instagram