Problems of an old Celebris - Help me!

[chey]

I have an old DEC Celebris motherboard manufactured for socket 4 and socket 5 Pentium processors. But I cannot use it because I only have got the original motherboard. At home I had some memory, both type of the processors needed and a AT power supply.
I switched on, and I waited. And waited. But nothing happened.
After one or two minutes every chips and memory cards had been a bit warm exept of the processor (I only wanted to see if it worked, so I did not give any cooling to the processor).
There is only one jumper to set up the processor. It is needed to choose which type of processor (socket 4 or socket 5) do you want to use.
There are two headers called "p54c power connector" (for socket 5) and "p5 power connector" (for socket 4). Physically they are like USB, PS/2 or serial port headers and I do not know how to use them.
I am very sad because I love this type of motherboard, but it does not work.

Please, help me!

 

[livelife]

reply for chey

Are u having problems with comecting the power supply, or with the processor??

If it is the processor then u have to set the jumpper that is asking which processor to use, to the setting for your processor.

If it is to do with the power supply for an "AT" motherborad then you should be looking for two power leads and conections.
The power conections may now be colse to the power supply but easy to spot they both should be in series whith each other. and the power cables should be coloured Orange, Red, Yellow, Blue, Black, Black in that order. and they both conect with the black cables side by side.

also conect the cooling fan to the power conection on the motherborad but don't put it into place other the motherborad so that the motherborad thinks that there is a cooling fan.
and make shoure you have some sort of anti-static protection.

I hope this helps

 

[Bobo]

I only wanted to see if it worked, so I did not give any cooling to the processor

How do you know it didn't overheat?

 

[chey]

Thanx for your helpness.

The processors work well with other motherboards. I know, I tried it. I know they didn't overheat becuse I was very careful when switching on the computer. I think the processor doesn't get any power.
This motherboard needs an AT power supply, I connected it to the board. But it isn't an AT board, it's like Olivetti's and Siemens-Nixdorf's compact computers. I haven't got its original power supply, and nobody nkew if it had any special connectors.

The two power connectors for the processors are like this:
:.:::
and this:
:::.:
There are 9 pins, and I don't know what to do with them. I really don't know if they are made for jumpers or special connectors or something else.

 

[Cromewell]

How do you know it didn't overheat?

Its a socket 4/5 pentium you can run those OCd with a passive heatsink only. It's not like now where no cooling = hotboxed.

Make sure you keep the black wires touching when you connect the main power or your motherboard is toast

 

[Lax]

My friend has an old DEC mobo (like 4 I think) I could ask him and see what he says about it.

 

[pentium III @ 1000 mhz]

hey you should throw in a p55, bka socket 7 with mmx technology i think they're only 5-10 $ for a 233 mhz cpu, but tha's ur call not mine

 

[chey]

My friend has an old DEC mobo (like 4 I think) I could ask him and see what he says about it.

Thanks, it would be really good. I'm a lover of these old computers. One of my friends said its power supply was needed for a newer computer and the motherboard had worked well before that. After that he gave it to me. But he didn't know anything else of this Celebris.