A7V400-MX problem

  • Thread starter Thread starter Dan Nilsen
  • Start date Start date
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Dan Nilsen

Hello,

I recently bought a bundle/"upgrade system" from one of the local PC
shops. It consists of a case, an ASUS A7V400-MX, sempron 2500 CPU and
256 mb Ram (PC 3200 I think it was..). I built the system with, HD,
DVD etc., and it just didn't want to boot. Thinking it could be the HD
or the DVD that caused the problem I disconnected these.

Starting up with only RAM and CPU, and what happens is as follows:
The system powers up and comes to the POST screen, the error message
'CMOS checksum error' is displayed. It's a brand new MB, and I assume
the battery should be ok.
I can get into BIOS and check CPU temperature etc. which was 50
degrees C. The computer then shuts down.. I've tried a different RAM,
and change the settings on the DIP switches, but I guess using the
default should be alright enough. And, the CPU speed is shown as 1100
for some reason.

Any ideas would be highly appreciated. I suspect the motherboard is
faulty, but that may not be the case.

Cheers,

Dan
 
Dan said:
Hello,

I recently bought a bundle/"upgrade system" from one of the local PC
shops. It consists of a case, an ASUS A7V400-MX, sempron 2500 CPU and
256 mb Ram (PC 3200 I think it was..). I built the system with, HD,
DVD etc., and it just didn't want to boot. Thinking it could be the HD
or the DVD that caused the problem I disconnected these.

Starting up with only RAM and CPU, and what happens is as follows:
The system powers up and comes to the POST screen, the error message
'CMOS checksum error' is displayed. It's a brand new MB, and I assume
the battery should be ok.
I can get into BIOS and check CPU temperature etc. which was 50
degrees C. The computer then shuts down.. I've tried a different RAM,
and change the settings on the DIP switches, but I guess using the
default should be alright enough. And, the CPU speed is shown as 1100
for some reason.

Any ideas would be highly appreciated. I suspect the motherboard is
faulty, but that may not be the case.

Cheers,

Dan
Click to expand...

I have an identical problem with mine. First off, unplug your computer
from the wall socket, then look in your manual for the cmos reset/erase
jumper and follow the instructions. Your cmos checksum error should be
gone now. As for the cpu showing 1100, you have it on the default fsb
(100mhz). You have to set the dip switch (it's directly above the floppy
connector on the mb). You may have a misprinted manual, so the correct
settings are (on is up, but you should see it marked on the switch) : 1
- off, 2-5 on. You will then have your fsb at 166mhz which will give you
1826mhz.

Hope it helps.
 
Chachi said:
I have an identical problem with mine. First off, unplug your computer
from the wall socket, then look in your manual for the cmos reset/erase
jumper and follow the instructions. Your cmos checksum error should be
gone now. As for the cpu showing 1100, you have it on the default fsb
(100mhz). You have to set the dip switch (it's directly above the floppy
connector on the mb). You may have a misprinted manual, so the correct
settings are (on is up, but you should see it marked on the switch) : 1
- off, 2-5 on. You will then have your fsb at 166mhz which will give you
1826mhz.

Hope it helps.
Click to expand...

Thanks for the tip. Tried it out, but no luck. Still get the CMOS
error message, and the frequency is still reported to 1100 Mhz. There
is a pattern however, when the CPU temperature reaches 50-51 C it
shuts down. I've tried to disable the CPU overheating protection, but
it doesn't make any difference whatsoever.

Any ideas anyone? I'm powering up the thing with a minimum, one ram
chip, and the CPU..

Dan
 
Dan said:
Thanks for the tip. Tried it out, but no luck. Still get the CMOS
error message, and the frequency is still reported to 1100 Mhz. There
is a pattern however, when the CPU temperature reaches 50-51 C it
shuts down. I've tried to disable the CPU overheating protection, but
it doesn't make any difference whatsoever.

Any ideas anyone? I'm powering up the thing with a minimum, one ram
chip, and the CPU..

Dan
Click to expand...

Something is wrong there. If you indeed set the dip switches for the fsb
and it didn't change the speed, and your cmos error was not cleared with
the reset jumper, I would rma the board. If the dip was set wrong, it
either defaults back to 100mhz or doesn't post. Recheck that the
switches were set properly, if they were, you probably have a bad board.
It happens... Sorry to give you the bad news...
 
Chachi said:
Something is wrong there. If you indeed set the dip switches
for the fsb
and it didn't change the speed, and your cmos error was not
cleared with
the reset jumper, I would rma the board. If the dip was set
wrong, it
either defaults back to 100mhz or doesn't post. Recheck that
the
switches were set properly, if they were, you probably have a
bad board.
It happens... Sorry to give you the bad news...
Click to expand...

Hey,
I recently bought the ASUS A7V400-MX board w/XP3200+ and after full
assembly the PC came on,then off...I then removed everything and
re-assembled only for the same results...

Feeling that something may allready be fried and I never even made it
to the post screen,I brought my problem online which led me to this
forum to read much simular results...

I went back once again before packing everyhing up and found that my
cpu fan was actually resting on a motherboard componet instead of the
cpu !!! I bent that sucker over as far as I could & the machine has
been running Great ever since...

Hope this Helps

I keep wanting to try motherboards made by someone other than ASUS
cause I currently have 4 of them now, but they all 4 run Great...
 
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