Any chance of getting info on the bootup screen of the board? bottom lines, either text or readable photo.

^this

Also yeah it's not a pcchips.

weedeewee wrote on 2021-05-11, 21:37:

Any chance of getting info on the bootup screen of the board? bottom lines, either text or readable photo.

For the moment it hasn't arrived, it should arrive in days.
After I should see if it starts and in that case I will put a photo.
I needed the info for setting the jumpers, on the MB there are several, I hope there is silk-screened what they are for, because otherwise I might have difficulty starting it if the settings are wrong.

From flicking through some options, it looks sort of like an Acorp layout, except for the BIOS chip in the wrong place and the wrong chipset. Ok, those are pretty major differences, but they do have the RAM between the AGP and PCI slots. e.g. http://www.win3x.org/uh19/motherboard/show/7974

I replied in the other thread but I'll post it here again ^^

imi wrote on 2021-05-11, 21:30:

PC@LIVE wrote on 2021-05-09, 21:46:

I don't think it's a PCChips, but maybe it's PCPartner ?, I have to do a search to identify it exactly, and to look for the manual, if anyone knows what MB is they could kindly tell me make and model (or possibly where to find the manual).

seems to be a "PINE Technology SB1-A" board with SIS5600 chipset, I only found a single reference to it on some russian site: https://01.img.avito.st/image/1/GB6337axtPeBa … 9thZT18tPMLfr71
but that seems to be it.

Good pointer. I saw the photo showed SI21, so searched for that and found:
https://www.elhvb.com/mobokive/archive/Pine/S … si21/index.html

The .doc file is a manual, could be the right one.

[oh, wait, the photo imi posted had SI21 on the silkscreen, but I don't see that on PC@LIVE's photo]

Well, good luck, keep us informed when you get it.

This board definitely gives me a pc-chips vibe, and while the pine board is quite the match, just slight version difference, better vrm. I can't shake the feeling that this rolled out of one of the pcchips/ECS/... factories.

yeah the VRM is different and it lacks the marking that points to the "SI21" but that manual mentions the crystal audio so still seems to match.

I thank you all for helping me.
In fact apart from some difference to the VRM, it looks just like the PINE of the link.
I downloaded the link files, the manual and more, I think they can be useful, in any case I keep them aside in case of need.
I think it will arrive in a couple of days, to test it I think I would use a cheap VGA (which I know to be working) I would use a Trident or an ATI, both AGP 2X and with 4MB of RAM.
The seller sent a Pentium II instead of the Celeron + Adapter 370 / S.1, I don't know the frequency but that's okay anyway, I'll do the tests with 32MB RAM with GM72V chip, usually they go in all PCs.

Today I tried the PINE SI21 motherboard.
It starts up but as you can see in the images it crashes at post 41 0d.
Beyond the post block (41 0d), it beeps endlessly, despite having tried to change various VGA CPUs and RAM.
The only thing that in the POST CARD the LED of the + 3.3V is off, I don't know if this is strange, I measured the voltages on the mosfets and the values ​​seem normal, one has a low value at PIN2 (+ 1.48V), it is del Q5 (LX8384) I don't know if this causes it to fail to boot and hang.
It would help to know what the + 3.3V mosfets might be, maybe one is faulty.

Now you've got the board, any chance of some photos of the board? It might help identify things. Out of interest, do the post card give the same result plugged in to one of the ISA slots (just in case there's a problem with that PCI slot)?

41 is current post code, 0d is previous post code
41 seems to indicate initialize floppy controller stage.

the 3v3 missing could be by design or it could actually indicate an actual fault on the board.
try to measure between the 3v3 pins on the pci bus and ground directly with a multimeter.
By design then it should be close to zero or floating, if something's wrong then maybe something more like the 1.5v you measured earlier.
You could also do a continuity check between the pci 3v3 pins and the atx 3v3 pins (orange)

snufkin wrote on 2021-05-14, 20:53:

Now you've got the board, any chance of some photos of the board? It might help identify things. Out of interest, do the post card give the same result plugged in to one of the ISA slots (just in case there's a problem with that PCI slot)?

It arrived yesterday, and it should be a PINE SI21, for the photos I try to photograph the mosfet areas.
Aesthetically, the card is like new, there is no scratch on the tracks on the back.
I tried with an ISA video card, it is visible in the picture with the PC on, the block is always there.

PC@LIVE wrote on 2021-05-14, 21:05:

It arrived yesterday, and it should be a PINE SI21, for the photos I try to photograph the mosfet areas.
Aesthetically, the card is like new, there is no scratch on the tracks on the back.
I tried with an ISA video card, it is visible in the picture with the PC on, the block is always there.

Sorry, I wasn't clear, I meant with the post card rotated 90 degrees and put in one of the ISA slots, just to see if it gives the same result.

weedeewee wrote on 2021-05-14, 20:54:

41 is current post code, 0d is previous post code 41 seems to indicate initialize floppy controller stage. […]
Show full quote

41 is current post code, 0d is previous post code
41 seems to indicate initialize floppy controller stage.

the 3v3 missing could be by design or it could actually indicate an actual fault on the board.
try to measure between the 3v3 pins on the pci bus and ground directly with a multimeter.
By design then it should be close to zero or floating, if something's wrong then maybe something more like the 1.5v you measured earlier.
You could also do a continuity check between the pci 3v3 pins and the atx 3v3 pins (orange)

Yes, in the POST CARD booklet there is that. For the + 3.3V (LED off) I will do some tests, in fact I believe that this voltage is missing somewhere, if I am not mistaken the + 3.3V is used by both the AGP and the PCI, and it seems to me also by the RAM.
I'll see if there is continuity with the pin of the ATX power supply and in the MOSFETs, I measured the values ​​of all the PINs except the two under the CPU (here only the PIN2).
If you are interested I can report the values ​​of each mosfet, but at the PIN2 of the read values ​​there are none at + 3.3V, three are about + 5V, three others are lower, I have read + 2.50V on the Q7, + 1.84V on the Q6, and + 1.48V on the Q5.

snufkin wrote on 2021-05-14, 21:09:

PC@LIVE wrote on 2021-05-14, 21:05:

It arrived yesterday, and it should be a PINE SI21, for the photos I try to photograph the mosfet areas.
Aesthetically, the card is like new, there is no scratch on the tracks on the back.
I tried with an ISA video card, it is visible in the picture with the PC on, the block is always there.

Sorry, I wasn't clear, I meant with the post card rotated 90 degrees and put in one of the ISA slots, just to see if it gives the same result.

A ok thanks
So I did it once in various attempts, and I checked a little while ago, it hangs at post 41.
Before the block at post 41 and the continuous beeps, always make the long beep and the two short beeps, even with the POST CARD in the ISA slot.

I put a couple of pictures of the mosfets present in the motherboard, I hope they are useful to understand what they are for.
If you are interested I can photograph other details of the card, the I / O chip I think is a SIS 6801, the audio chip is a Crystal CX4235-XQ3.

PC@LIVE wrote on 2021-05-14, 21:27:

Before the block at post 41 and the continuous beeps, always make the long beep and the two short beeps, even with the POST CARD in the ISA slot.

Video adapter error. did you by chance leave the vga card out of the computer on that attempt ?

Also try using contact cleaner in the slots.

Often these old boards have been sitting around for a long time, the slots sometimes stop making good contact with cards.

A bit of contact cleaning will help it along if this is the case.