Hi, As a beginning thanks to all that helped from my precedent posts... Speaking of, in answer to one of my last post re 7300/180 trouble at start up (chime-HD scratching-know good monitor black screen-that's all) and after much RAM HD & CD rom messing-cuda-power & PRAM reset, someone (sorry do not remember who :-( ) told me to disconnect both HD & CD and to try booting from the floppy drive only. This I did with OS 7.5 and nothing happen, I mean nothing ie floppy do not spin at all. Since the fellow that told me to try that trick seems to be meaning that if the floppy test was bad, then the logic board was probably dead, I stopped messing around with the 7300/180. Now I have been giving a 7200/120 and guess what? Chime-HD scratching- monitor screen black! After the usual tests (PRAM-RAM...), I tought i would try the floppy. So I disconnected both the HD & CD drive and tried starting on OS 7.5 on floppy. Nothing no floppy spinning. So I guess that I would ask: is the floppy test a good one to determine if logic board is bad? If not, anyone care to give a step by step suite of things to do to determine when and how can a logic board be declared dead. Thanks, JCT (beginning to be tense when I start my iMac :-)
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