Does it boot with a standard P2, like a 350 ? just curious...

criz_me wrote on 2023-02-27, 22:21:

- Post code card is also of no help, at least to me. "00" does not seem to resolve to anything with Award

I can see C1 on the picture?
just 00 would mean CPU is not running at all. I would start with measuring 3.3V rail and CPU vCore.

criz_me wrote on 2023-02-27, 22:21:

- PC speaker beeps long repeatedly, when no RAM is present - so that is something...

and that would suggest cpu is running

@Horun - I do not have a PII at hand, sorry

@rasz_pl - I think the tester indicates the current code on the left display and the previous code on the right. Not 100% sure though.
How / where would I measure 3.3V rail and CPU vCore? Not exactly an electrical engineer here 🙁

Not really sure what I am doing - but here is what these two measure.

hello mate ,

C1 code is memory related code so id check another stick of memory.
And for sure id finger check if anything getting hot.

btw why do you using AT psu ?

Hi ciornyi, yep I tested two different sticks, SM564168574N03R and Micron MT16LSDT3264AG-13EE1. The ladder was the one the system was running fine with, for a few days.
And yes, the headsink is getting warm / hot.

Mainly for testing purpose, to eliminate the ATX PSU as a possible cause.

Cheers
Christian

With the GPU inserted the post code card indicates "25" and "0C". Without it it indicates "50" and "C5", sometimes in reverse order. I find it hard to make any sense from it https://www.hzdr.de/FWR/VB/BIOS/awpost.htm

criz_me wrote on 2023-02-28, 19:49:

@rasz_pl - I think the tester indicates the current code on the left display and the previous code on the right. Not 100% sure though.

C1 shows up later, C0 is the first code possible, so CPU is running, but stopping at C1

criz_me wrote on 2023-02-28, 21:26:

With the GPU inserted the post code card indicates "25" and "0C". Without it it indicates "50" and "C5", sometimes in reverse order. I find it hard to make any sense from it https://www.hzdr.de/FWR/VB/BIOS/awpost.htm

memory problems, reseated? memory and now it progresses further
http://mrbios.com/techsupport/award/postcodes.htm scroll down to Late Award BIOS (4-5x PnP)
all of those codes still indicate ram

criz_me wrote on 2023-02-28, 19:49:

How / where would I measure 3.3V rail and CPU vCore? Not exactly an electrical engineer here 🙁

measure on all the coils on the motherboard - three wire wound around yellow/blue rings on right side of the cpu
try switching Vcore test/normal and Vio jumpers
maybe memory supply is weak and results in erratic memory behavior

criz_me wrote on 2023-02-28, 19:49:

How / where would I measure 3.3V rail and CPU vCore? Not exactly an electrical engineer here 🙁

see pic 😀

@shevalier CPU core = 1.832v, 3.3v rail = 3.500v

@rasz_pl
Coils in picture above:
- Bottom: 5.091v
- Top left: 0.459v
- Right: 0,002v

Yes reseated, both RAM sticks, multiple times, different slots. They both work on the Gigabyte and Ford Lian MB.

Appreciate your help guys!
Christian

VCore set to test: no change.
VIO set to 3.66v: Post card indicates "25" and "C5" constantly on every start. No further change.

Which CPU was installed when you measured the core voltage?
Could you try the SL3JM and verify that you are getting close to 2.05 V?
Then we can be mostly sure it's not an issue related to the VRM.

watson wrote on 2023-03-01, 23:07:

Which CPU was installed when you measured the core voltage?

I support this question.
For Tualatin - to many, for "mendocino_like" - to small.
I would check the connections between HIP and slot1 (on the cpu/adapter side) for VID`s signal.
Page 9
https://pdf1.alldatasheet.com/datasheet-pdf/v … HIP6019BCB.html

as watson says
>SL3JM, SL6BY on MSI MS6905, SL3S9, SL5XQ on Abit Slotket III (*)

none of those are too close to "CPU core = 1.832v".

>VIO set to 3.66v: Post card indicates "25" and "C5" constantly on every start. No further change

0C is further in the post process than C5

>Coils in picture above:
>- Bottom: 5.091v
>- Top left: 0.459v
>- Right: 0,002v

did you measure that with no cpu? 😀 right one is cpu voltage, top left is ram supply

rasz_pl wrote on 2023-03-02, 05:21:

top left is ram supply

For AT-motherboard (asus did this and for ATX) this DC/DC from 5v to 3.3V.
Its system 3.3V rail for RAM, chipset, AGP and PCI

@watson:
Which CPU was installed when you measured the core voltage?
-> SL5XQ that came with the Slotket III

Could you try the SL3JM and verify that you are getting close to 2.05 V?
-> 2.147v
SL3S9 -> 1.729v

@shevalier:
Voltages between HIP VCC (pin 28) and VID of the Slotket, see IMG_488. Also measured GND (pin17) and VID see IMG_489. I am not sure if I am measuring the right pin on the Slotket. It is the small VRM on IMG_0484.jpg.

@rasz_pl:
did you measure that with no cpu?
>> That could be, yes, sorry. See IMG_490, I think the coil is pulling voltage down to exaclty 1.800v.

criz_me wrote on 2023-03-02, 10:39:

Voltages between HIP VCC (pin 28) and VID of the Slotket, see IMG_488. Also measured GND (pin17) and VID see IMG_489. I am not sure if I am measuring the right pin on the Slotket. It is the small VRM on IMG_0484.jpg.

you arent 😀 afaik this small chip is for VTT or termination, has nothing to do with Vcore

criz_me wrote on 2023-03-02, 10:39:

That could be, yes, sorry. See IMG_490, I think the coil is pulling voltage down to exaclty 1.800v.

Cpu and ram are getting good power, at least voltage vise. Since it was working with Tualatin VTT might be suspect, Asus had problems with good VTT in early boards, they called it "photoshop bug" or something. googling .. oh there it is https://www.eecis.udel.edu/~portnoi/asusreworkguide.html
also Fixing ASUS P2B freezes on memtest86+ modulo 20 test
Might need a scope to verify further.
You could try flashing another bios chip in the meantime just to be on the safe side.

Indeed I already did flash two other bios chips to be sure 😀 It was a journey in itself to find a suitable programmer, at least for me.
I will look into the guide, thanks.

rasz_pl wrote on 2023-03-02, 11:41:

afaik this small chip is for VTT or termination, has nothing to do with Vcore

VTT reg at pic.
I don't think, that is problem to boot