Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!rochester!pt.cs.cmu.edu!andrew.cmu.edu!cb29+ From: cb29+@andrew.cmu.edu (Chad Kavanaugh Bisk) Newsgroups: comp.sys.amiga Subject: Re: A500 Hardware Problem Message-ID: Date: 29 Jun 89 20:32:34 GMT References: Organization: Class of '90, Carnegie Mellon, Pittsburgh, PA Lines: 27 In-Reply-To: I've had many replies to my request for help on my hardware problem. Thanks to all those who took time to help me out. It turns out that I have two problems, not one. The cause of the graphics problems is still undetermined (although its not the 1.3 ROM as I replaced that with original 1.2 ROM and got the exact same effects; I think the blitter chip must have gone sour somehow). The cause of the sound problem turned out to be a loose power connector on the system board (the black socket where the power cable enters the A500). If I press down slightly on the power cord, the sound returns to normal. I also found that this clears up a problem I've been having with the internal floppy where sometimes it won't do anything (any disk attempted disk access causes the light to light, but no drive activity other than a near silent hum from the drive motor like it's stuck or something) until I physically jar the machine. I'll bet its the ground connection which is loose since it only seems to effect this and sound quality and static over the sound lines. At this point I'm thinking I had probably just better cut my losses and take it in to a local dealer before I break something else trying to fix it. Of course, maybe I'll play with it just a little bit more first ;-). Thanks again for all the help. -- Chad Bisk -- cb29@andrew.cmu.edu