Jetway 694AS Blue Screens


O

OraceHorse

Hello. I've got a computer built around the Jetway 694AS motherboard. I
bought the motherboard second hand a few months back, and it came with a
PentiumIII 700Mhz processor, 128MB memory and an old PCI video card.
It's worked alright until recently. It is now pretty much unusable. It
crashes every 5 - 10 mins with a WindowsXP stop screen. The error codes are
different and sometimes the crash occurs before windows even opens. I think
this level of instability suggests a hardware fault.

On one occasion the computer failed to bootup and the motherboard generated
lots of error beeps and finally a message displayed saying something like
'Warning The system has crashed due to overclocking. The system speed has
been temporarily resorted to the default.'
It successfully booted up and loaded Windows, but after a couple of minutes
Windows crashed with a blue Stop screen.

There is a jumper that can be set to one of 3 CPU bus frequencies. Either
66, 100 or 133Mhz and the speed can then be increased in the BIOS. This is
how to overclock it. I have not changed any settings, they are the ones in
use when I bought it.
It is currently set at 133Mhz, with no increase in the BIOS setting. In
other words its set at 133 with no over-clocking.

Is there anyone familiar with this motherboard who could suggest what could
be wrong.?
Thanks.
 
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O

OraceHorse

OraceHorse said:
Hello. I've got a computer built around the Jetway 694AS motherboard. I
bought the motherboard second hand a few months back, and it came with a
PentiumIII 700Mhz processor, 128MB memory and an old PCI video card.
It's worked alright until recently. It is now pretty much unusable. It
crashes every 5 - 10 mins with a WindowsXP stop screen. The error codes
are different and sometimes the crash occurs before windows even opens. I
think this level of instability suggests a hardware fault.

On one occasion the computer failed to bootup and the motherboard
generated lots of error beeps and finally a message displayed saying
something like 'Warning The system has crashed due to overclocking. The
system speed has been temporarily resorted to the default.'
It successfully booted up and loaded Windows, but after a couple of
minutes Windows crashed with a blue Stop screen.

There is a jumper that can be set to one of 3 CPU bus frequencies. Either
66, 100 or 133Mhz and the speed can then be increased in the BIOS. This is
how to overclock it. I have not changed any settings, they are the ones in
use when I bought it.
It is currently set at 133Mhz, with no increase in the BIOS setting. In
other words its set at 133 with no over-clocking.

Is there anyone familiar with this motherboard who could suggest what
could be wrong.?
Thanks.
You're quite right about the cost of
troubleshooting.
Still it would be satisfying to find out the problem.
Here's some more info.
It has 2 hard drives with 2 operating systems on each. Windows 98 and
Windows XP and both are unstable with blue screen crashes and restarts so
its definitely a hardware problem.

When it was crashing frequently I ran Memtest86 and after a few seconds it
reported around 5000 errors!
I restarted the test and the same thing happened - 5000 errors reported
pretty much immediately. Restarted memtest again and let it ran for hours
with no errors!!!
I then stopped it, booted to Windows and ran Prime 95 and it ran okay for 3
hours until I stopped it. So the failure is intermittent. Am I right in
thinking the memory is probably ok. If it was that badly damaged the some
errors would show up all the time. Memtest say that if there are 1000's of
errors this may be caused by the motherboard/processor.

The instability in intermittent. It can go for hours being stressed with
nothing going wrong. Then it keeps crashing after a few mins and becomes
unusable. When this happens memtest86 shows thousands of errors after a few
seconds.!
This is strange
 

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