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Jag's Classic Mac Forum
Ask a classic question, get a classic answer. 68k (Non PowerMac) questions ONLY please.
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| Viewing Page 1 of 1 (Total Posts: 12) |
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Oscar
 IP: 80.217.141.135 Feb 9, 08 - 7:21 AM |
Hi, i have a macintosh classic II problem
Hi, i just bought myself an Machintosh Classic II. took it home, pluged it in. and all i can se on the screen is just black and white stripes. tried the mac/se repair site. but nothing wokred. heres a picture of it: http://img.photobucket.com/albums/v336/walters_walk/Bild165.jpg please help me, im soo exited to use it. ive even got a modem with it and a lot of games //thankfull for help. oscar karlsson |
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jag
IP: 76.125.106.159 Feb 9th, 2008 - 8:28 PM |
Re: Hi, i have a macintosh classic II problem
bad solde joint (bad logic board) You can try taking it apart and putting it back together. I've seen tons of these, most are not fixable without replacing the lb. |
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Oscar
IP: 80.217.141.135 Feb 10th, 2008 - 1:43 AM |
Re: Hi, i have a macintosh classic II problem
what is an lb? you mean i should try to re-solder the motherboard? |
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Tom Lee
IP: 71.139.195.82 Feb 10th, 2008 - 8:38 PM |
Re: Hi, i have a macintosh classic II problem
This is extremely common with the SE/SE30/Classic/II, and it's almost never caused by bad solder joints. There are numerous electrolytic capacitors on the logic board, and they actually leak conductive chemicals as they degrade with age. I'm willing to bet that you will see telltale smudges at one or more locations on the board. The battery may also be leaking crud as well. The cure is to do a thorough clean, and then to replace all the capacitors. Sometimes, a clean by itself will suffice for a time, but a long-lasting repair requires replacement. How to clean: Remove all RAM, and then put the logic board in the dishwasher. Yes, a dishwasher; it's not a joke. Use no detergent. Dry thoroughly for a couple of days. Reassemble. In about half of the cases, the mac will boot. However, as I said above, replacing all the caps is the only recommended method. Use tantalum capacitors, rather than the original aluminum electrolytics. Modern tantalums have no liquid electrolyte, and hence don't leak. |
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Oscar
IP: 80.217.141.135 Feb 13th, 2008 - 9:52 AM |
Re: Hi, i have a macintosh classic II problem
Hey thanks!! got it working by givin it at bath!! does anybody know if theres any chance for me to use my broadband on it. through some kind of network card or something? |
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Tom Lee
IP: 71.139.191.56 Feb 14th, 2008 - 10:25 AM |
Re: Hi, i have a macintosh classic II problem
Congratulations!! Glad that a bath solved the problem for you. As mentioned before, a more permanent fix may eventually require more work, but it's great that you got it working now. As to broadband, the best thing is probably to find a scsi-to-ethernet adapter. These were made by companies like Asante and Dayna. These are no longer in production, of course, so you will have to hunt for them in the usual places, like ebay, the 68k Macintosh Liberation Army Trading Post, or the LEM Swaplists. Don't expect superfast speeds, though, even if you do find one and connect it up. The Classic II is not a high-speed computer. :) |
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Nick
IP: 67.130.224.4 Feb 14th, 2008 - 1:55 PM |
Re: Hi, i have a macintosh classic II problem
That's the answer Tom Lee will give you every time you have a compact Mac issue. I didn't actually do that when I had a checkerboard pattern on my SE, I unplugged it for 24 hrs, and prayed, turned it on, it worked. It means that the RAM and the video generation is more or less working. Congrats! Usually when you get a old Mac from somewhere, it doesn't work properly. Also, you will NEVER be able to get broadband on a Classic! Mabie a modem though. |
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Tom Lee
IP: 66.237.74.194 Feb 14th, 2008 - 2:54 PM |
Re: Hi, i have a macintosh classic II problem
Well, it's not quite accurate to say that I always give that same advice for any compact mac problem (do a search here and at the 68k macintosh liberation army to see what advice I give for different problems). But for the common "simasimac" problem (google for the term), the problem is nearly always leaking goop from capacitors and/or batteries. That's why I offer this correct advice whenever this particular symptom appears. It's the result of having actually diagnosed and fixed several dozens of these macs. While we're on this subject, not all compact macs are prone to this problem. The original compacts up to, and including, the Plus, generally do not suffer from this problem (far fewer electrolytic bypass caps). More commonly, they have problems with bad solder joints at the yoke connector or flyback transformer, as well as some other well-catalogued ailments. That's why jag initially offered the suggestion he did. It's just that, for the Classic II that Oscar asked about, the symptoms are not consistent with the standard solder joint problem. In your case, leaving it overnight and having it work the next morning is what is generally called "luck." Perhaps the goop dried enough to allow booting. The next humid season, however, and you may be back to where you started. Who knows? You've run one experiment, from which hardly anything solid may be deduced. |
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Nick
IP: 67.130.224.4 Feb 15th, 2008 - 9:38 AM |
Re: Hi, i have a macintosh classic II problem
Well I know it was luck! Sometimes you have to do that with Mac's. I'm not saying giving it a bath is a stupid thing to do, I actually would believe it would work. I also didn't mean "all" the compact Mac's. I meant the compact Mac's with the checkerboard pattern or bars issue. I don't put the boards in the washer, but I do clean them with a lot of water! Sometimes I think that you work at Apple Tom!:) Seriously! If there was a 68k store somewhere at least... It's really not a bad issue, but it is unexpected, and easy to fix. I don't believe that ALL of it is crud in the board. I dropped my SE off my bed on accident, and it caused it for 24 hrs. Sometimes luck can come with your Mac problems... |
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Tom Lee
IP: 66.237.74.194 Feb 15th, 2008 - 4:56 PM |
Re: Hi, i have a macintosh classic II problem
Point well taken. Not all checkerboard problems are caused by the leaking goop. However, it is so often the cause that this is one of the first things to look for. A quick visual inspection of the logic board will reveal whether or not it's a good theory. Any strange behavior after a fall is indeed unlikely to be goop-related. In those cases, it's most often something like a connector or ram module that has worked loose. I'd open it up as a matter of course and see. It might come back to life on its own, but I'd be concerned about how reliably it would work that way. And although I don't work for Apple (it would be fun, though), I've repaired so many of these for friends and family over the last 20 years that I sometimes feel like I do! :) |
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Oscar
IP: 80.217.141.135 Feb 16th, 2008 - 1:37 AM |
Re: Hi, i have a macintosh classic II problem
i dont know. mine prob was a cap problem. when i looked clooser at the caps, all around was this yellowish goo. so the bath did good. after looking through the internet i seen the soluthon giving it bath/dishwasher several times. mabey becous its the easiest way to clean it all over. but im pretty sure that one day i have to replace all the caps? so, the internet thing? and another question. i heard somewhere that you could get a progrem for your system 7.? so that i could handle hardrives of 1gb or less. dont remember. but i have a usb drive. do you know if theres a converter from usb to scsi. so that i could formate a little pice of the usb drive for macintosh and use it as a link through my new coputer.? |
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Tom Lee
IP: 71.139.191.56 Feb 16th, 2008 - 1:06 PM |
Re: Hi, i have a macintosh classic II problem
Yes, the fact that you saw the residue near the capacitors is a sure sign that the bath was required. Congratulations again on a job well done! As to your other questions, there is no practical USB to SCSI converter, unfortunately. Some folks have assembled SCSI-to-IDE-to-compact flash adapters, but they are very expensive (hundreds of dollars). The Classic II will work fine with very large capacity SCSI drives, but you may have to subdivide them into partitions of less than 2GB to avoid problems (the actual upper limit may be higher, depending on OS). I have a 9GB scsi drive hooked up to one of my SE/30 macs, and it works great. As for OS, you can download up to system 7.5.5 free from Apple. For the Classic II, I would recommend that version of OS. If you only have a Windows machine, it is still possible to create install disks for the Mac, although the procedure is a little elaborate. For details, see home.earthlink.net/~gamba2. |
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