iMac 27" 5k late 2014 freezes durring boot process

my iMac is a late 2014 5K, 27" screen. It freezes after a long wait and the progress bar freezes 1/2 through booting It won't boot in Safe Mode. Option command P R does the 2ed boot chime but then the progress bar still freezes at the half way point. I just ordered a new 24” M1 iMac but it won’t get here till the first week in January.

iMac. Was working perfectly and shut off as if power had been cut ( no flickering house lights or other indications of power problems)

a 7 year old iMac is beyond economical repair I fear so I just ordered a 24” iMac replacement but is there anything else I can try so I have a computer for the next month? Typing on my phon is not much fun at my age. I don’t have the magic thumb typing of youth🥸