Ram problem on apollo 3060

Hi

I have an apollo 3060 card that not recognized the simm ram, i have tested many modules of various size from 4 mb to 32 mb but the result is the same. I have test the card in my A4000d and in the motherboard of a friend (always A4000d). I tried to extract the 3 mach chip, clean the pin with contact cleaner and reintegrated in their place but none is changed.
The 68060 (rev 1) work fine and the card work at 50 mhz (no overclocking), i have also test to change the oscillator with one at 40 mhz to see if something changed but also this test is failed.

Anyone as any idea?
Or someone can repair this card?

Thanks

Massimo

jumper ram open disable the ram, verify.

Italian? Where you are?

Try FPM RAM and not EDO

@ piacc64

The jumpers are in right position (close) but i have test also open.
The jumpers are: Ram: close (enabled)
Scsi: open (disable autoboot)
060: close (enable 68060)
Ed: open (disable ED-RAM)

Clk 040/060: On 060

P.S. - Alessandria not far from piacenza

@ Alexh

If i remember right in the simm that i test there were also fpm modules but i not secure of this, i check and eventually try.

i have more ram 72 pins edo and fpm

1 mega
4 mega
8 mega
16 mega
32 mega
64 mega

@ Alexh

I test an 4Mb simm fpm 70ns into apollo but is not recognized. This simm module is surely working. I taken this from A4000 motherboard and never give me any problems.

I tried to contact the amiga repair center in france for email, asking if they can fix it but i haven't received any reply. The amiga repair center is still open?

the board have a eprom?

Quote:

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Originally Posted by piacc64

the board have a eprom?

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yes, an eprom signed 60/525.

change the eprom with another equal for test or find the "bios" for write a new eprom or for verify is good