as long as I cant use the micronic I decide to use an ECS not that beautiful but its very fast instead

have anyone the micronics board???

As long as I dont can use it, here the setup for DOS

take a better picture of the missing ICs, are you sure someone desoldered them? it is not uncommon for boards to have non populated components

hi

with magnifing glases its visible, not easy to catch with a normal camera.
both chips have signs of desoldering. I have searcht for pictures from this board and there is a version where the lower one is missing, but no pic at all with two ICs missing.

S2 Sedan wrote on 2020-05-01, 13:58:

hi

with magnifing glases its visible, not easy to catch with a normal camera.
both chips have signs of desoldering. I have searcht for pictures from this board and there is a version where the lower one is missing, but no pic at all with two ICs missing.

You don't own the board by yourself?

EDIT: If somebody already de-soldered something, there will be more troubles IMHO.
But people here are really brave, try to resurrect everything, I respect that.

Have you tried messaging the user RiP? He opened a thread about the same board (I'm sure you know about it as you asked there as well). Have you tried to power the board as it is?

^Agreed (tho probably has too few posts to PM atm) - we really need to see a more detailed pic of the whole board & of the area with the 'missing' ICs.

Problem is that these may not be missing at all - @RiPs board is an OEM version of the M5PE for IBM (it's the baseboard from a PC SERVER 300 - FRU 06H8756) with both ICs in place and the pic of the one I linked (source says it's a Micronics M5PE revision A4) is, I suspect, also OEM and has one of the two ICs in place.

Variation between boards, either by revision or retail & OEM is commonplace. Perhaps the reason the board wont POST is the Dallas RTC is dead.

This has the top one filled:
http://home.att.ne.jp/alpha/pcboard/0282NN.jpg

I don't have a better resolution picture.

Yeah, OP has seen that one (its the one I mentioned I linked to here Need to identify this server motherboard

I own the board and also try to power them on, but no post at all.

Dallas has 2,8V and works fine on an other Board for testing

its very rare and no good pictures available.

Could be it was defect before, but I want try to repair the board, but I dont now which ICs I have to put on this.

No, its not possible for me to write PN to anyone because I dont have enough posts here.

Are you using a proper PSU ? Most of those type boards require the power connector on top to be connected as well as the two standard AT powers. I have a similar (but not same) board and it does require all three AT powers to boot. If it requires a certain Dallas RTC chip and you try to use a differant version it may not boot, some (like DS13 and DS15 series) cannot be replaced with just any old Dallas chip.

Maybe it helps a lot when I replace the missing ICs first

I got the chance to buy the IBM machine NOS with the same board in it 😀

have replaced the two missing ICs and now the board runs well 😀 Its now spare for the IBM server ^^

Very nice glad to hear you were able to save the board.

yeah, I like the clean look of the board. not that "pack as much as possible at a small board" look thats very common for this period
sure It is not the fastest Socket4 board, no EDO support and can handle only 512k cache.
but I think its fast enough to play a some DOS games on it 😀

Is this an IBM PC Server 300?
I thougt mine had an IBM motherboard installed, but I did not look inside for years.
http://www.elhvb.com/mobokive/eprm/eprm3/f7957.htm
Got this same ECS board too.

Great to hear that it's working now!
Maybe post a few bench scores when you find the time...

I have also Micronics M5PE Motherboard with P60 CPU

Here a speedsys screenshot.
Performance is not superb.