@ xeno 74 & all
I can now finally say with confidence that my intermittent boot up problems are solved
thanks to Matthew @ Amigakit for getting me started to solve the problem and Lyle for allowing me to free up a free PC slot on NEMO.
what i did:
1- Turn off PSU power, remove PSU power cable from NEMO connector. Wait a minute and plug it back in.
2- Take out 2GB Ram stick from right side of PA6T and install it on opposite side
after these 2 steps referred by Amigakit the problem was still not solved so i installed the extra 2GB Ram stick into NEMO (now have 2GB on each side of PA6T) but my X1000 would only boot to a black screen with no serial debug ouput SO did the following:
3- Took out extra Ram stick previously installed and repeated steps 1 and 2 above.
4- IMPORTANT: realized that I had Lyle's onboard HD-Audio installed and working great so decided to remove my sound card to free up a PCI slot for my ethernet card which was next to my HD6850 on a PCI-e to PCI extender card.
5- booted up fine and after 3 full days of testing I can finally boot my X1000 consistently each & every time

(also, today I installed the extra 2GB stick and finally i can boot my X with 4GB no problem!)
@xeno74
I hope this info gets your problem solved as well but if you have any questions just let me know and I'll be happy to try and troubleshoot your issue step by step so you can finally put -solved- on the this thread title
strange thing is that I tried removing the PCI-e to PCI extender card and installed the ethernet card into it's own PCI slot before but it didn't help??