A7N8X Deluxe system won't start

  • Thread starter Thread starter Andreas Hammarstedt
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Andreas Hammarstedt

I put together a system from parts. It wouldn't start, so I stripped it down
to: A7N8X Dlx mobo, Athlon XP 2400+, Fortron P400-60PFN 400W power supply,
Ahanix dBox case.
The mobo LED goes on when I flip the power switch, but when I press the
power button all that happens is that the CPU fan spins up for a fraction of
a second, then stops. There is no POST message (voice or beep.) My question
is, is there a reasonable way to figure out what part has the problem? I
don't really know where the problem is, as it is right now. Oh, and I tried
without the CPU as well. Same result. I tried a CMOS reset twice. Same
result. I'm not sure whether all the case wires are connected to the right
places, since the case documentation is crappy to say the least. But since
the fan twitches when I press the power button, at least that has to be in
the right place.
Could the mobo simply be DOA? Are there any simple tricks to verify this?

Any and all suggestions appreciated. I was hoping to have it up and running
by now. :(
 
Andreas Hammarstedt said:
I put together a system from parts. It wouldn't start, so I stripped it down
to: A7N8X Dlx mobo, Athlon XP 2400+, Fortron P400-60PFN 400W power supply,
Ahanix dBox case.
The mobo LED goes on when I flip the power switch, but when I press the
power button all that happens is that the CPU fan spins up for a fraction of
a second, then stops. There is no POST message (voice or beep.) My question
is, is there a reasonable way to figure out what part has the problem? I
don't really know where the problem is, as it is right now. Oh, and I tried
without the CPU as well. Same result. I tried a CMOS reset twice. Same
result. I'm not sure whether all the case wires are connected to the right
places, since the case documentation is crappy to say the least. But since
the fan twitches when I press the power button, at least that has to be in
the right place.
Could the mobo simply be DOA? Are there any simple tricks to verify this?

Any and all suggestions appreciated. I was hoping to have it up and running
by now. :(
Click to expand...

The power switch is a momentary contact switch.
You could check it with an ohm meter.
One thing to try is remove the switch you have connected
to the power on pins now and momentarily short the
two pins together. If it works correctly you had the
wrong switch or its bad.

Jim Manning
 
Andreas said:
I put together a system from parts. It wouldn't start, so I stripped it down
to: A7N8X Dlx mobo, Athlon XP 2400+, Fortron P400-60PFN 400W power supply,
Ahanix dBox case.
The mobo LED goes on when I flip the power switch, but when I press the
power button all that happens is that the CPU fan spins up for a fraction of
a second, then stops. There is no POST message (voice or beep.) My question
is, is there a reasonable way to figure out what part has the problem? I
don't really know where the problem is, as it is right now. Oh, and I tried
without the CPU as well. Same result. I tried a CMOS reset twice. Same
result. I'm not sure whether all the case wires are connected to the right
places, since the case documentation is crappy to say the least. But since
the fan twitches when I press the power button, at least that has to be in
the right place.
Could the mobo simply be DOA? Are there any simple tricks to verify this?

Any and all suggestions appreciated. I was hoping to have it up and running
by now. :(
Click to expand...


We experienced the same thing here.

Workaround:
- Get an additional two-wire fan (without speed control).
- Connect the CPU Fan to the Chassis Fan header on the board and the
additional fan to the CPU Fan header.
- Switch your system on, it should boot now.
- Get into BIOS and switch off the Q-Fan option.
- Shut down the system, remove the additional fan, connect the CPU Fan
to the CPU Fan header
- Start computer, get into BIOS and change settings as desired, play
around with the Q-Fan options.

This procedure worked here with the board of a friend of mine, I myself
did not have these problems with this board...


Good luck!


-Gernot
 
There is no POST message (voice or beep.) My question
is, is there a reasonable way to figure out what part has the problem? I
Click to expand...

Plug speakers in to the on board sound card to hear the voice trouble
codes.
 
RMA the board. Had this happen to 2 of 5 A7N8X Deluxe boards. Version 2
boards seem to have fixed this problem.
 
It could be a couple of things...

1. maybe the floppy drive power cable is not on all 4 pins. seen that cause
a PC not to boot. simply unplug the floppy power and try to boot.

2. power switch might be bad, try using the wires to the RESET switch, and
press that. What are the odds that both switches are bad.

3. hook speakers to onboard audio, POST reporter should tell you if
something is wrong.

4. if CPU is installed wrong or has bent pins, that might cause problem.
pull and inspect and re-install as necessary.

5. CPU Can MUST be isntalled on the CPU FAN 1 block. that would definitely
cause the system to turn on then right back off.

6. I've seen sometimes if you have a power cord coming out of the PS that
has 2 big connectors (CD and HDD Drives) and one litle one (floppy), and you
use all three on the same wire harness, then that may cause a problem.
Spread the power around to the other wire harness. that might solve the
problem also.

If this does not work, It's wither bad RAM or a bad motherboard. Hope it
helps.


Andreas Hammarstedt said:
I put together a system from parts. It wouldn't start, so I stripped it down
to: A7N8X Dlx mobo, Athlon XP 2400+, Fortron P400-60PFN 400W power supply,
Ahanix dBox case.
The mobo LED goes on when I flip the power switch, but when I press the
power button all that happens is that the CPU fan spins up for a fraction of
a second, then stops. There is no POST message (voice or beep.) My
Click to expand...
question
 
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