so decided uninstall imessage macpro last night, system asked me re-start did , system in endless chime reboot (i can't see grey screen). i've gone ahead , re-seated hardware in system (no fault lights on memory boards either) , it's not solving problem, mean have corrupt os?
hoping it's not main logic board went...
doesn't sound have done logic board. more you've somehow corrupted os degree, won't boot properly. have tried resetting pram, , if doesn't work, maybe try resetting smc.
if it's still not working, post here again.
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