A7V333 not booting

  • Thread starter Thread starter Jiri =?iso-8859-1?Q?Kuukasj=E4rvi?=
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Jiri =?iso-8859-1?Q?Kuukasj=E4rvi?=

Hi!

I have this dead Asus A7V333- mobo.
It´s 99.5% dead. That 0.5% comes from the green led that lits when PSU
is connected.
It doesn´t respond to power switch any way.

Test setup:
Duron 600
128M DDR
AGP-bus video card
HEC 300W PSU

I have tryed to alter jumper configurations, disable RAID controller
etc. but no help. It stays dead.
No diagnostics messages from either the speaker or external speaker.

Now, just a few minutes ago, I took all parts off, except the speaker.
And I forced the PSU
on by connecting the PSU on- wire (Green wire on the connector) to
ground. And the damn
thing started to complain "No cpu found" (No cpu installed, because I
didn´t want to risk it with this experiment)
The system stayed on as long I kept the green wire connected to ground..

So, any ideas?
Still some jumper wrong? Or is the Mobo broken (As I believe it is..)

- Jiri K.
P.S. Sorry for my english...
P.S.2. Remove XX from the address if you wish to send email directly to
me.
 
-- snip --
The system stayed on as long I kept the green wire connected to ground..

So, any ideas?
Still some jumper wrong? Or is the Mobo broken (As I believe it is..)

- Jiri K.
P.S. Sorry for my english...
P.S.2. Remove XX from the address if you wish to send email directly to
me.
Click to expand...

My son's EPOX computer did this once to me. I had thought the PSU was bad until
I tested it and found it to be working properly. Still, I swapped out the PSU
and it started to boot normally. I then put the original PSU back in and it
still worked properly. I have not had a problem with it since.

I may be mistaken, but I believe that the mobo must keep the PS-ON line asserted
continuously for the PSU to power up. If it drops out, so does the PSU. Logic
would then dictate that there may be something wrong with the turn on/hold on
circuit of the mobo.

Have you confirmed that the power on switch is functioning properly and hooked
up properly to the mobo?


LoL

Paul
 
Paul said:
-- snip --


My son's EPOX computer did this once to me. I had thought the PSU was bad until
I tested it and found it to be working properly. Still, I swapped out the PSU
and it started to boot normally. I then put the original PSU back in and it
still worked properly. I have not had a problem with it since.

I may be mistaken, but I believe that the mobo must keep the PS-ON line asserted
continuously for the PSU to power up. If it drops out, so does the PSU. Logic
would then dictate that there may be something wrong with the turn on/hold on
circuit of the mobo.

Have you confirmed that the power on switch is functioning properly and hooked
up properly to the mobo?
Click to expand...

Yes, I have done all that.
* Tested with another PSU
* Checked the switch (even used a screwdriver to connect the pins.)

No help..

It really works like that, as long as the PS-ON wire is connected to GND, system is
on.
(checked it from ATX specification)

As I read the specification, I got another idea: (Pure speculation) Maybe the PW-OK
signal is somehow involved in keeping the machine running.. And now it doesn´t
get where it´s supposed to go. So Mobo thinks power is bad -> shuts down.

- Jiri K.
 
Just wondering...have you tried clearing the CMOS? This always seems to do
the trick if my A7V333 starts acting up.

Milhouse
 
Done that.. No help.

- Jiri K.
Just wondering...have you tried clearing the CMOS? This always seems to do
the trick if my A7V333 starts acting up.

Milhouse
Click to expand...
 
Double check the chassis open alarm (pg 41) and if you haven't done so
already try switching the Jumper-free mode (pg 19) and using only one
memory module.
 
Done all that, also.. No help.

- Jiri K.
Double check the chassis open alarm (pg 41) and if you haven't done so
already try switching the Jumper-free mode (pg 19) and using only one
memory module.
Click to expand...
 
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