How did I miss this for so long!?

any updates?

please tell me you havent given up on this beauty.

I have not - yet!
It´s a pity to see this fine mainboard in shambles.
After removing the ISA slots and repairing countless traces it still wouldn´t start up.
Since I´m not sure the BIOS is still o.k. and Supermicro mainboards refuse to start with BIOSes from other brands in most cases (and the other way round), I decided to put the P6DNE aside and wait for my EEPROM programmer to arrive. I plan to reflash the BIOS (it´s still available on the SuperO site) and then try again and continue with the troubleshooting.

Not sure if it works on something as new as a pentium pro machine but perhaps you could try to look into this as well ? http://www.minuszerodegrees.net/supersoft_lan … dmark%20ROM.htm

While working on the TYAN S1662 and waiting for parts, I thought it might be a good idea to have another go at my Supermicro P6DNE that has been sitting in my shelve for 3 years now gathering dust.
I decided to start with replacing the two (probably) buffer chips that came off when I initially cleaned everything. I had put them some place "safe" so they wouldn´t get lost, but today I cannot remember where.
I tried to find some picture of this board on the net to find out, but there´s virtually not a single higher resolution picture to be found. Was the P6DNE that rare or did noone bother to take some decent pics?
So VOGONS is the last resort again. Someone here "must" own this board 😉

It´s about U16 and U17, they seem to be in the ISA bus between the southbridge and ISA slots - maybe F244 or F245:

majestyk wrote on 2024-03-23, 07:21:

While working on the TYAN S1662 and waiting for parts, I thought it might be a good idea to have another go at my Supermicro P6D […]
Show full quote

While working on the TYAN S1662 and waiting for parts, I thought it might be a good idea to have another go at my Supermicro P6DNE that has been sitting in my shelve for 3 years now gathering dust.
I decided to start with replacing the two (probably) buffer chips that came off when I initially cleaned everything. I had put them some place "safe" so they wouldn´t get lost, but today I cannot remember where.
I tried to find some picture of this board on the net to find out, but there´s virtually not a single higher resolution picture to be found. Was the P6DNE that rare or did noone bother to take some decent pics?
So VOGONS is the last resort again. Someone here "must" own this board 😉

It´s about U16 and U17, they seem to be in the ISA bus between the southbridge and ISA slots - maybe F244 or F245:

2unknownbufferchips.JPG

See Supermicro P6DNE Dual SKT8 - No Post. Power Connector Mystery

I had a look at my dragon horde, but it looks like I dont have this board - however, I have a P6DBE - i thought it would be "close enough" but its not. sorry.

the p6DBE is dual slot-1 440BX, btw.

PC Hoarder Patrol wrote on 2024-03-23, 08:12:

majestyk wrote on 2024-03-23, 07:21:

While working on the TYAN S1662 and waiting for parts, I thought it might be a good idea to have another go at my Supermicro P6D […]
Show full quote

While working on the TYAN S1662 and waiting for parts, I thought it might be a good idea to have another go at my Supermicro P6DNE that has been sitting in my shelve for 3 years now gathering dust.
I decided to start with replacing the two (probably) buffer chips that came off when I initially cleaned everything. I had put them some place "safe" so they wouldn´t get lost, but today I cannot remember where.
I tried to find some picture of this board on the net to find out, but there´s virtually not a single higher resolution picture to be found. Was the P6DNE that rare or did noone bother to take some decent pics?
So VOGONS is the last resort again. Someone here "must" own this board 😉

It´s about U16 and U17, they seem to be in the ISA bus between the southbridge and ISA slots - maybe F244 or F245:

2unknownbufferchips.JPG

See Supermicro P6DNE Dual SKT8 - No Post. Power Connector Mystery

SM P6DNE.jpg

A bit offtopic but I was wondering why the pics from that post were so familiar to me 🤣. That's Topcat from BCN! 😁

PcBytes wrote on 2024-03-23, 15:51:

That's Topcat from BCN! 😁

I wonder if he finished the story over there...

Thanks for the link PCH-Patrol - I must have missed this topic completely in 2022. If I remember right, both chips were the same type, so they are both 74F245.
For a start I reconstructed all the traces under ISA slot 2 today and inserted a new ISA socket.

He unfortunately didn't. The corrosion on his was way too nasty to begin with. The thread you linked showcased the board after cleanup, but fairly obvious that it was a goner.

I do remember commenting on that as I was surprised to hear of VARTA crap on as late as socket 8.

That´s exactly what mine looked like - even worse in some areas! I spent like one day cleaning it.
Supermicro loved the VARTAs so much they even put them on Socket 7 mainboards.

The traces under ISA slot 3 were restored today and a new socket was soldered into place.
A lot of threading wires through damaged vias was necessary here. I also finished the work on the backside and now I´m starting to prepare the landings for the two tristate busdrivers "74ALS245".

Everything you see can be repaired, what´s making me nervous is what I cannot see, like vias with no trace on the top and no trace on the backside (see yellow circle). These are connected to traces in the inbetween-layers.

Yersterday I continued the restauration of the buffer landings:

Hopefully this can help someone in similar cases in the future.

Then the two chips were soldered in.

Of course the mainboard wouldn´t start after that, just hanging with no POST code (----) and the "IRDY" LED constantly lit. At least reset worked.
I then cehecked all address and data (and IRQ, DRQ, DACK...) bus connections between the southbridge and the ISA slots and the respective pins of the BIOS chip - all perfect, no wonder after repairing dozens of them.
Some of the address lines pass the tri-state-buffers U16 / U17, that got replaced so I checked the T/R# and OE pins there. Bingo - the "OE#" input of U16 had no connection to the southbridge. Another destroyed VIA turned out to be the culprit. After threading another wire through it the mainboard came alive again - after three years.

This was quite a journey...

Congratulations ! Awesome effort ~

majestyk wrote on 2024-03-25, 15:44:

The traces under ISA slot 3 were restored today and a new socket was soldered into place. A lot of threading wires through damag […]
Show full quote

The traces under ISA slot 3 were restored today and a new socket was soldered into place.
A lot of threading wires through damaged vias was necessary here. I also finished the work on the backside and now I´m starting to prepare the landings for the two tristate busdrivers "74ALS245".
p6dne_back.JPG
p6dne_buff.JPG
p6dne_buff1.JPG
Everything you see can be repaired, what´s making me nervous is what I cannot see, like vias with no trace on the top and no trace on the backside (see yellow circle). These are connected to traces in the inbetween-layers.
p6dne_totc.JPG

Amazing job!

This better not be an April fools joke post...

impressive repair!

luckybob wrote on 2024-04-01, 14:19:

This better not be an April fools joke post...

I would have chosen something requiring less effort in this case...
...like having found an unused ASUS P/I-P65UP8 at the local garage sale for $ 5.00 😀

3dfx Voodoo 3 3000 (w/TV out) being found in a shoebox of GPUs 🤣

If you had said P65UP5... I might have believed you.