Power Mac G4 Firewire stopped working

I've got a Power Mac G4 from a friend to replace my broken G3, have my drive installed, runing system 9 and is fine for few weeks but now the two firewire port is not working! I have installed a firewire card and is still not showing! had check the system profiler and the firewire port say no drive conected, PCI slot show card info but can't see any drive conected. Have done the vram and pmu reset but firewire still not responding. Otherwise everything is running normal including two USB port.     Can anyone help please!!

Many, but not all G4s will boot OS9.2.2, & some require a special version of OS9.
If the G4 has FW/800 ports it won't boot OS9.
So we know more about it...
At the Apple Icon at top left>About this Mac, then click on More Info, then click on Hardware> and report this upto but not including the Serial#...
Hardware Overview:
Model Name: eMac
Model Identifier: PowerMac6,4
Processor Name: PowerPC G4 (1.2)
Processor Speed: 1.42 GHz
Number Of CPUs: 1
L2 Cache (per CPU): 512 KB
Memory: 2 GB
Bus Speed: 167 MHz
Boot ROM Version: 4.9.2f1

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    Message was edited by: Thomas Bryant
    Message was edited by: Thomas Bryant

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