[ale] Dead Motherboard?

[Greg Clifton]

>From your reply it is not clear if you are talking about the car battery or
the motherboard battery. I am talking about the CMOS battery (usually a coin
type 3V these days) on the motherboard. If you have cleared the CMOS and you
still get nothing from the motherboard, pull the RAM and see if you get any
beeps. If still nothing (and there is nothing else to unplug from the
motherboard), time for a new motherboard. Next time, disable the DC supply
to the M2 and wait a few minutes before attaching or detaching power from it
to the motherboard. Also follow that proceedure for installing/removing any
add in cards.

On Fri, Aug 7, 2009 at 12:20 PM, Omar Chanouha <ofosho at gatech.edu> wrote:

> I am using an M2-atx. I am hooked the 12v from the battery to the M2+
> and the I hooked the M2- to the frame of the car. The power supply was
> meant for cars, so it should handle all spikes. I removed the battery
> overnight, and nothing changed. The fan spins properly. The bench
> power supply shows about .5 amp current drain.
>
> I also hooked the 12v ignition from the ford harness to the M2, as
> well as the amp on.
>
> -O
>
> On Thu, Aug 6, 2009 at 11:36 PM, Greg Clifton<gccfof5 at gmail.com> wrote:
> > Carputer? How are you powering the system, inverter to AC power supply or
> > 12V DC supply? Maybe you had a power surge when you unplugged and zapped
> > something. The CMOS can be VERY static sensitive, so that the BIOS can
> get
> > mucked up without actually being destroyed. You have already stripped
> > everything and tested with a known good power supply, so the problem has
> to
> > be confined to the motherboard components or CPU or RAM, correct? Not
> likely
> > that the CPU or RAM crapped just from a power cycle. Does your power
> supply
> > turn on at all? Does the fan spin, just "twitch" or do nothing? Your USB
> > drive is probably running off the 5V standby power which is always
> present
> > when AC is fed to the power supply (perhaps you have noticed that you can
> > charge USB devices w/o turning the 'puter on. But if you have a dead
> short
> > crowbar shutdown of the power, you shouldn't have standby power either.
> >
> > I recommend you use the jumper setting to clear the BIOS or even better,
> > remove the battery for an hour or so (with no power plugged to the
> > motherboard). That should unscramble your BIOS and put it back in the
> > default or failsafe state reviving your board.
> >
> > One final note, NEVER scrimp on the power supply. No truer saying about
> > computers than GIGO, esp. with regards to the power input!
> >
> > Regards,
> > Greg Clifton
> >
> > On Thu, Aug 6, 2009 at 10:11 PM, Omar Chanouha <ofosho at gatech.edu>
> wrote:
> >>
> >> I put a carputer together using an intel D945GCLF2D motherboard. I
> >> installed it and everything worked. Then I unplugged it to the
> >> faceplate on, but when I plugged it back in the screen wouldn't
> >> display anything. So I took it to my bench, unplugged everything from
> >> it, and hooked it to a reliable power supply. Again, nothing. I don't
> >> get any BIOS beeps, nor any LED activity.  If peripherals are
> >> attached, they do get power, i.e. the dvd tray opens, which is
> >> connected via usb. It is so wierd b/c I didn't change anything that
> >> would affect the mobo, nor did I reverse the polarity. Could it be
> >> memory? I don't think so because the mobo guide says it gives
> >> beeps/messages for memory erros. Is the mobo dead? Are there any
> >> possible explanations as to why this happened, so I don't do it again?
> >>
> >> Thanks,
> >>
> >> -O
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> >
> >
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