After changing some BIOS settings in an attempt to enable virtualizartion, the PC doesn’t even hiccup when the start button is pushed. This is an ATX power supply in an ASUS motherboard with an AMD CPU (2 cores, 64-bit). It’s openSuse 11.4, with updates through last week. Before this failure I had reflashed the AMI BIOS to ASUS version 2302, the latest, and restarted successfully several times. Power reaches the MB: the “pilot light” is on and I measure 5 V from ground at the lead to the start switch. The switch indeed shorts when pushed–V at the MB drops from 5 to 0 V. I’ve removed the button cell (3.34 V) and line power for an hour. I used the jumper to reset the CMOS memory many times–that used to work when I had a problem completing a boot, but now it won’t start.
Could the BIOS configuration prevent the power supply from turning on? Or is it time for an independent test of the PS? Does anyone have the ISO file for the utility disk for the ASUS M4A785T-M motherboard (it didn’t come with my custom-upgraded PC; ASUS hasn’t responded to a query for a copy) so I could reflash the BIOS again (after it boots again)?
Thanks.
Lets just be clear.
So you upgraded the BIOS and were able to use the machine OK
But did you alter anything else after this?
Can you no longer access the BIOS settings to reset it to defaults?
>
> After changing some BIOS settings in an attempt to enable
> virtualizartion, the PC doesn’t even hiccup when the start button is
> pushed. This is an ATX power supply in an ASUS motherboard with an AMD
> CPU (2 cores, 64-bit). It’s openSuse 11.4, with updates through last
> week. Before this failure I had reflashed the AMI BIOS to ASUS version
> 2302, the latest, and restarted successfully several times. Power
> reaches the MB: the “pilot light” is on and I measure 5 V from ground
> at the lead to the start switch. The switch indeed shorts when
> pushed–V at the MB drops from 5 to 0 V. I’ve removed the button cell
> (3.34 V) and line power for an hour. I used the jumper to reset the
> CMOS memory many times–that used to work when I had a problem
> completing a boot, but now it won’t start.
>
> Could the BIOS configuration prevent the power supply from turning on?
> Or is it time for an independent test of the PS? Does anyone have the
> ISO file for the utility disk for the ASUS M4A785T-M motherboard (it
> didn’t come with my custom-upgraded PC; ASUS hasn’t responded to a
> query for a copy) so I could reflash the BIOS again (after it boots
> again)?
> Thanks.
There should be a jumper on the mb that you can use to force a BIOS reset to
defaults. Check the mb docs.
On 02/21/2012 01:46 AM, konsultor wrote:
> that used to work when I had a problem
> completing a boot, but now it won’t start.
sounds like this setup has been a problem for a long time…
it could be
-a bad power supply
-a static zapped chip or two on the mb (like maybe the bios holding
chip–do you always ground yourself properly before sticking your
pinkies in the box?)
-intermittent grounding problem (corrosion, bad cables, shorts, cracked
mb with faults in embedded circuit runs, etc etc etc)
-and probably a dozen things i’ve not thought of
only a shop (or you with the right equipment and know-how) to
methodically walk though each potential trouble path
you wrote “I used the jumper to reset the CMOS memory many times” and,
quite frankly i’m not sure but what there might be a max number of times
that particular type of chip can be rewritten…
i think if it were mine i’d find a reputable repair shop who has the
documentation for that board…
CAF, yes, could operate after flashing the bios. No changes in hardware, only in BIOS settings. Now there is no response at all. There is 5 V present when “off.”
Will, I did use a jumper on the MB to reset the BIOS.
DenverD, you remind me of another aspect, the reason I changed the BIOS: couldn’t install KMV, got an error message that the CPU didn’t support it. Since the hardware chip (Athlon) is supposed to support virtualization, I looked at the BIOS and found a setting that seemed to turn it off–changed it. Each reboot then stopped with a warning about a power surge during the previous boot and would continue only if I accepted default settings. This happened also after turning off the surge alarm in the BIOS.