Building Shuttle SN95G5

  • Thread starter Thread starter stuart.layton
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stuart.layton

Hi,

i am building two Shuttle pc's Actually I am upgrading them. they
came with Athlon 6400 processors in them and i am upgrading them to
64bit x2's

The first upgrade went fine and the computer started up, recognized
the processor and it worked.

The second computer wouldn't start a bright red led by the AGP slot
turned on that is labed LD3 I haven't been able to find any
documentation about this LED or what it means. If I put the old
processor back in it works.

I am boggled because the upgrade worked just fine on the first pc but
not the second.
 
reseat the vidcard

also make sure the bios is up to date on that machine
Click to expand...

Its neither, I already upgraded the bios to recognize X2 processor.
The light is one with or without the video card inserted.
 
Its neither, I already upgraded the bios to recognize X2 processor.
The light is one with or without the video card inserted.
Click to expand...

possibly the New CPU is faulty? or the zif?
power supply not up to the task?

you have:

-reset the CMOS?
-stripped it down to the minimums to POST?
-Reseated all cards and memory?


http://global.shuttle.com/download03.jsp?PI=489&PL=3

AGP proof LED: Serving as a smart burnout protection for the motherboard, this
red LED lights up if you plug in any 3.3V AGP card into the AGP slot. When this
LED is Lit, there is no way you can turn on the system power even if you press
the power button. The red LED(AGP proof) is a smart protection from
motherboard burn out caused by an incorrect AGP card. If you plug in any
3.3V AGP card into the 1.5V AGP slot, this LED lights up thus preventing the
system to power up. This LED remains off if you plug in a 1.5V AGP card.
 
JAD said:
http://global.shuttle.com/download03.jsp?PI=489&PL=3

AGP proof LED: Serving as a smart burnout protection for the motherboard, this
red LED lights up if you plug in any 3.3V AGP card into the AGP slot. When this
LED is Lit, there is no way you can turn on the system power even if you press
the power button. The red LED(AGP proof) is a smart protection from
motherboard burn out caused by an incorrect AGP card. If you plug in any
3.3V AGP card into the 1.5V AGP slot, this LED lights up thus preventing the
system to power up. This LED remains off if you plug in a 1.5V AGP card.
Click to expand...

First check, would be to simply reseat the AGP card. It might not
be fully in the slot.

That feature (AGP proof or similar) appeared on my Asus P4B with 845 chipset.
It appears to monitor the state of the TYPEDET pin on the AGP card. TYPEDET must
be grounded if the video card is 1.5V or 0.8V type, and not a 3.3V
only card. A 3.3V only video card (which can damage some modern
motherboards), has an open circuit for TYPEDET.

A mistake was made in the design of some AGP video cards, in
that they don't have a direct connection to ground for TYPEDET.
Some boards have a low value resistor between TYPEDET and ground,
and that is enough to cause an intermediate reaction by the
motherboard. This was a problem with one of the Matrox
video cards. The result was, instead of the motherboard
regulator delivering 1.5 volts, it delivered about 2 volts
or so.

On occasion, the circuit on the motherboard, connected to the
red LED, can make a mistake. It could be a part in the circuit
isn't working right, and there is nothing wrong with the video
card. If it was my video card, I'd get out the multimeter and check
TYPEDET.

TYPEDET# is 2A. Ground is 5A. Check for zero ohms between
the two pins, as a correct setting for a modern card. If
the reading is "infinite ohms", that signals the card wants
3.3V for VIO supply.

http://pinouts.ru/Slots/agp_pinout.shtml

The AGP spec is here, and is no longer on the Intel site. FYI.
http://web.archive.org/web/20030314...m/technology/agp/downloads/agp30_final_10.pdf

Pin 2A would be on the "back" (solder side) of the card.
Check out page 14 of this spec, for a picture of the
layout pattern for a motherboard, which labels the faceplate
end, and the position of the pins. This is how I know it
is on the back of the card, and nearest the faceplate
end.

http://www.motherboards.org/files/techspecs/apro_r11a.pdf

I'd just check for a loose card first though.

Paul
 
I called Shuttle tech support and they said that the the red led
labeled LD3 was an indicator light that the AGP card was not seated
properly. So I reseated the card and the light stayed on. I thought
the card should be bad so I swapped the card with one I know works and
the light was still on.

The light goes off however when I replace the dual core processor with
a single core.

The problem is that the Athlon 6400 X2 processor I have is E6 stepping
and the motherboard only supports E3 E4 stepping. So it is an issue
with the processor not the video card.

Thanks for your help.
 
I called Shuttle tech support and they said that the the red led
labeled LD3 was an indicator light that the AGP card was not seated
properly. So I reseated the card and the light stayed on. I thought
the card should be bad so I swapped the card with one I know works and
the light was still on.

The light goes off however when I replace the dual core processor with
a single core.

The problem is that the Athlon 6400 X2 processor I have is E6 stepping
and the motherboard only supports E3 E4 stepping. So it is an issue
with the processor not the video card.

Thanks for your help.
Click to expand...

If it is a classical "AGP protection" circuit, the idea is, the
checking of TYPEDET is intended to prevent any power from getting
to the board. So if an AGP protection circuit says the wrong kind
of video card is present, it shouldn't matter how many times you
press the power button on the front, the motherboard should
not send PS_ON# to the motherboard.

With no power present, there is no way to distinguish processor
types (via the BIOS).

So that suggests the red LED is not what I think it is, and
is instead some other kind of status light. That would make
more sense, with your described symptoms.

If no video card is present, and the X2 is installed,
what happens then ? Does the red LED still light ?

Maybe the design concept is, the red LED lights, unless
a BIOS instruction is executed to clear the LED. Perhaps it
is more of a processing activity indicator ? But the description
from the manual, makes the LED sound more like an AGP slot
protector.

Paul
 
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