> >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 :-) > > Is it a mac monitor or one with an adapter and what size and res is >it? Is the vram onboard (if so how much?) the mobo or on a pci card? How >much ram is in the slots? Is the cache onboard? (bad cache will give a >black screen) What happens after the scratching of the HD? Does it >scratch for quite a while as though the system is loading? > If it chimes the processor should be ok. Have you got a startup cd? >I bought a 8200/120 and put a 8500 mobo in it and had the same problem - >no video - cured it eventually though. > > Pete > some mac monitors doesnt work with PM and some monitor cables look the same but are different i use multiple scan monitors - my old LC screen just stayed black - try zapping the pram may reset the resolution ? kenta --
-- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
