With respect to the startup sequence and no video: What I would be doing in this case is remove any and all parts that don't need to be attached either externally or internally.
The idea here is isolation. It might be power related or something not plugged in correctly. I honestly do not know what might not be causing video but I left you some basic steps/advice in a previous reply. Check for bent pins on the card to the cable to the monitor. Check the cable for any cuts. Does the monitor work with another computer? What happens if you boot from a floppy drive? Any video then? Try the NuBus card in a different slot. Disconnect any device that is not immediately necessary, inculding keyboard and mouse and even the HD — boot from floopy. These are old Macs, but very cool, it's possible that there could be a power supply issue but I have my doubts unless you leave us info on anything suspicious. Look for capacitors who appear to be bulging at the top, typically a teltale sign of a faulty capacitor. If the power supply is suspected then open the PSU to check for this symptom. Does the power supply look normal, sound normal, are there any odd sounds that you should tell us about? Depsite the no video issue, does the mac remain on for as long as it is being fed power? Does it switch itself off? Do you sense large amounts of heat coming from any part of the computer that might seem abnormal? If possible, try the same video card and monitor on a different computer to rule them out. I hope this is helpful albeit general. These are mostly probing and analyzing that might lead to some isolation and eventual repair or simply reseating devices like the card or other connectors internal or extrenal. Keep us posted. I for one would love to see your fx up and running and I am really glad someone is taking care of such a classic! On Monday, 22 December 2014 18:07:33 UTC+1, Marek Drvota wrote: > > Hi, > > so it seems this time it was simple as this - two batteries replaced and > all works like a charm. > > Well at least starts - I can hear the startup sound HDD reading and > spinning but no video. > It might be that I’m using Apple 12 RGB monitor to save the space for the > testing here and IIfx is equipped with Formac ProNitron Video Card which > might not be able to support this strange small monitor. > > Anyone would have any suggestion for some NuBus video capable of > supporting 12RGB ? > > Cheers > > m > > On Dec 21, 2014, at 6:50 PM, Matt Patoray <[email protected] > <javascript:>> wrote: > > Try replacing the two 1/3 AA size lithium batteries that are under the > drive tray. One of the batteries supply the kickstart voltage to the power > supply to tell it to turn on. Also dos you try turning it on with the power > switch on the computer of the keyboard? > > If you do end up needing a power supply I have a spare working one. > > Sent from my iPhone > > On Dec 21, 2014, at 12:11 PM, Marek Drvota <[email protected] <javascript:>> > wrote: > > Hi all, > > finally I was able to clean up my newly acquired Mac IIfx just to realize > that it won’t start. > I’d like to check whether power supply or logic board failed - do any of > you know how to check if powersupply is ok or not ? > > Cheers > > m > > -- > -- > ----- > You received this message because you are a member of the Vintage Macs > group. > The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to [email protected] > <javascript:> > To leave this group, send email to [email protected] > <javascript:> > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > --- > You received this message because you are subscribed to the Google Groups > "Vintage Macs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- > -- > ----- > You received this message because you are a member of the Vintage Macs > group. > The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our > netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml > To post to this group, send email to [email protected] > <javascript:> > To leave this group, send email to [email protected] > <javascript:> > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > --- > You received this message because you are subscribed to the Google Groups > "Vintage Macs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout. > > > -- -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
