I would start with the very basics and remove and reseat your ram, pci and isa cards.

It has integrated audio and video.
If I remove the ram, there are different beeps.
I give up on repairing it for now, becouse I still have my main retro pc pentium mmx 166mhz on a lucky star 5v-1a ver.2.0 and 3 thin clients with dos, win95 and win98 to play with.
Fujitsu iCL ergopro X definitly needs a specialist in electronics to repair it.

If it worked for a bit but then just started failing, I'd look for blown/leaking capacitors on the board. You will want to clean up any leaks and refrain from powering the machine on again if the caps are blown.

Optionally the PSU might need to be replaced for the same reason. I would urge you to open it up and check before putting into storage again, as that risks further damage to the motherboard if the caps are leaking!

Cheers~
-Icy

It worked for a bit until I pluged in that adapter (ide to cf) the wrong way and at wrong voltage. It seems it can be switched from 5v to 3v with those jumpers. I fiddled with those jumpers too.
I checked again the mb and the capacitors seem fine. I cant open the damn PSU. I dont remember where I got this unit. It more then 10 years I think.
It may be the PSU, because It doesnt have a cooler. It was repaired/tempered with it (not by me). The PSU was getting warm, but not too hot.
Here are some more pictures. It has an old PSU with 3 power conectors to motherboard.

I know is dirty, but I wont bother to clean it up until is working again.

Sequence of 3 beeps sounds odd. I think this is the manual: https://www.manualslib.com/manual/920488/Fuji … ?page=63#manual and that says that if there's nothing on the screen when booting up then there should be a sequence of either 4 or 8 beeps.

There's a chance that if that CF-IDE adapter was plugged in back to front that some data lines were shorted to ground, which might have caused problems.

Uh oh, special PSUs are a pain. I have the same problem with my Aptiva 2176 with 4 power cables. Three going to the mainboard and a fourth one going to the ISA/PCI riser. Basically unreplaceable and any issues would require a repair of the PSU.

I took it out of storage today and checked again.

I think those are 3 short beeps and 1 long beep.
In Fujitsu PC Specialist's Handbook it says:
· · · - (1) There is no refresh of the system DRAM memory.
What is that mean?
I tried different ram modules. With FP it does those beeps. With EDO no beeps, but still no video output. All the rams work fine on other pcs.
My guess is that those ram modules work with 5 volts:
Since I pluged that adapter set to 3 volts in jumpers, and the floppy power connector I plugged in has 5 volt, maybe it screwed the PSU and is not delivering 5 volts?
I have a multimeter, but I dont know what to look for. Those 3 conectors on the mb are different. No P8 and P9. Those are marked A,B,C.

Or something is fried on the motherboard? I looked very close and all capacitors, cips etc. seems fine, no burn marks/exploding caps on the mb.

I think I did some progress with this socket 5 board.
I noticed something: if I connect the floppy drive the system keeps trying to acces the drive, and if I inserted a floppy disk the beeps change.
So acording to Fujitsu PC Specialist's Handbook for ErgoPro e-, x- and s- Series, the system is trying to force flash the bios.
I saw this "blind" bios flash at Retrospector78:
https://www.youtube.com/watch?v=0Z7LskUzFo8
But I cant find any bios updates for Fujitsu ICL Ergopro x450/90. My motherboard has an number: A9930174E.
Can anyone help me, please, with an old ftp or archive from fujitsu?
The file name for the BIOS load file should be BXX_VVV.LDB where XX is BIOS ID and VVV is the revision identifier.
My last picture with working system was this:

b0by007 wrote on 2023-05-07, 22:09:

But I cant find any bios updates for Fujitsu ICL Ergopro x450/90. My motherboard has an number: A9930174E.
Can anyone help me, please, with an old ftp or archive from fujitsu?
The file name for the BIOS load file should be BXX_VVV.LDB where XX is BIOS ID and VVV is the revision identifier.

Hey, Christ/Retronaut from the thread on the x453

So, go to this URL https://support.ts.fujitsu.com/IndexDownload.asp?lng=en
Click on the Downloads tab and a little window will open "Ask Fujitsu! We are here to help"
Click on the Product Search option, and enter Ergo Pro x450
And poof, there is the BIOS, and all the other related files for your PC 😀

So, those fast beeps, mean the PC is in FORCE Flash bios mode, which is odd as on the x453 that requires you to short a jumper during boot to get the fast beeps
Then, you need to remove that short, during the fast beeps, and it will shift to a different beep pattern
This means "give me the floppy with a .ldb BIOS file on it".
If you do that, and the floppy drive is working, and the disk in it has a valid .ldb file,
then it should chug away for about 20-30 seconds and then reset, with the new BIOS

If your machine is STUCK in the initial all fast, beep beep beep mode, it suggests the shorting process is different on your model
Or, yours has jumper pins, and there is a jumper on it, KEEPING it in stage one of FORCE flash process
Or there is something wrong with the machine

Do you have the correct manual for this machine? If so, pop the PDF URL for it here and we can all have a read of it
Its that FORCE Flash BIOS section I would like to read about on your machine
Maybes its different, maybe it does not rely on jumpers

Once you can get OUT of that mode, by un-shorting the jumpers, or whatever
Then the machine should boot again, or maybe its just requiring a BIOS flash, because the BIOS is borked

Over to you 😀