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checkerboard on a classic

Author	Topic
paxswill Starting Member USA 25 Posts	Posted - 29 Jun 2002 : 14:41:47 I just had A friend call me about a classic she bought used at a garage sale. It was supsed to work but when it starts up, it displays a black and white checkerboard pattern. Also, could someone tell me what the key combo is for the classic to boot off of the ROM? Thanks. Pax What's mine is mine, what's yours is mine
cinemafia Guerrilla Recon Leader USA 2965 Posts	Posted - 29 Jun 2002 : 15:44:50 I wonder if it's the standard grey desktop but with easy-access' magnification on? 666th poster and 666th thread-creator Mod of the Mac II series Forums Total 68K Macs liberated: 7 I Have No Legs!
Trash80toG-4 NIGHT STALKER USA 2899 Posts	Posted - 29 Jun 2002 : 16:49:41 quote: Also, could someone tell me what the key combo is for the classic to boot off of the ROM? Thanks. dunno offhand, grab the service and user manuals offline from our website links a/o check out LEM, i think i recall it being there in the article on the classic. jt ™. Trash Hauler: call sign: eight-ball C.O. AC-130H SpecOps 68kMLAAF
thelip Full Member USA 729 Posts	Posted - 29 Jun 2002 : 19:09:39 command-option-x-o it's a weird combo of some system 6 stuff. finder 6.1 and system 6.0.3 That's the ONLY useful thing about the classic. _______________________ Sgt. Thelip Heavy Weapons Specialist 950 division Liberated Macs: 12
maclover5 LC Doctor/Hot Rodder Australia 5830 Posts	Posted - 19 Jul 2002 : 04:33:18 if it doesn't even give you a happy Mac icon or say, "Welcome to Macintosh", and gives you the checkerboard pattern instead, i'd say its probably a dead analog board... -------------------------- Pizzabox LCs RULE!!!!!!! Warrior maclover5 68k Macintosh Liberation Army Number of 68ks Liberated: 6
nullarbor Starting Member 4 Posts	Posted - 23 Jul 2002 : 17:25:58 Alas, I've been away too long. Stupid school. All I really wanna do is play with macs (the real ones, none of this Reduced Instruction Set Crap). For the video problem, try: <http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html> To boot the Classic from ROM, hold down Command-Option-P-R at startup. ign
gdogkzo Junior Member 147 Posts	Posted - 29 Jul 2002 : 19:43:54 Alright, the Classic Problem is a dead motherboard. If the analog was dead, you wouldnt be getting a display at all.
maclover5 LC Doctor/Hot Rodder Australia 5830 Posts	Posted - 29 Jul 2002 : 20:53:48 quote: Alright, the Classic Problem is a dead motherboard. If the analog was dead, you wouldnt be getting a display at all. Actually, i have heard of compacts with dead analog boards suffering from this problem, even though the logic board was good. -------------------------- Pizzabox LCs RULE!!!!!!! Warrior maclover5 68k Macintosh Liberation Army Number of 68ks Liberated: 6
Marchie Chaplain USA 911 Posts	Posted - 29 Jul 2002 : 23:37:58 I can give you the solution sometime later today (Teusday) I gotta find the right book for that one :-) ~Marchie ~Chaplain Marchie Admin of The WonderLAN ~~"We are all Mad here"~~
paxswill Starting Member USA 25 Posts	Posted - 12 Aug 2002 : 19:01:48 She just e-mailed me and said that booting off of the rom worked and installed 6.0.8 or 7.5.3 on it. Thankyou very much for all of your help. Pax What's mine is mine, what's yours is mine
ehurtley New Member USA 63 Posts	Posted - 04 Sep 2002 : 12:53:41 quote: Classic from ROM, hold down Command-Option-P-R at startup No, thelip was right, it's Cmd-Opt-X-O. P-R does a PRAM reset. (I use the ROM system all the time on my dual floppy Classic. If only I could get a TCP/IP stack in there. Proud Liberator of over 25 Macintoshes!
bigsadhu Junior Member Cayman Island 462 Posts	Posted - 29 Sep 2002 : 14:49:49 Yesterday I found a classic with the exact same problem is a thrift store around here for $3. I'm going to have to go back and try the key combo to see if this one is only hibernating too. Cheers! CC Air Marshall, 605 sQUADRAn "What Microsoft has got in there is a grotesque, badly-documented pile of poo it doesn't fully understand itself." - The Register, 23/8/02
bigsadhu Junior Member Cayman Island 462 Posts	Posted - 22 Nov 2002 : 23:28:46 quote: Yesterday I found a classic with the exact same problem is a thrift store around here for $3. I'm going to have to go back and try the key combo to see if this one is only hibernating too. Looks like this on'e a deader. Exploded PRAM battery, and the resulting rather ugly melted mess on that corner of the mobo apperars to be a possible cause. Oh well. I've washed off the worst of it and given it a nice scrub with an old toothbrush... so just maybe... Anyone need a classic RAM expansion board? Or a clean case for a fishtank? Or any other bits for that matter? Let me know. Cheers! CC Air Marshall, 605 sQUADRAn "What Microsoft has got in there is a grotesque, badly-documented pile of poo it doesn't fully understand itself." - The Register, 23/8/02
jag Starting Member 22 Posts	Posted - 14 Aug 2003 : 15:15:15 This symptom is extremely common on old macs - a component has gone bad on the motherboard or the ram/ram card is not seated all the way. Seen it HUNDREDS of times at Goodwill when I was there. JAG http://www.jagshouse.com - the web's oldest classic Mac site, used Mac goodies for sale.
tomlee59 Starting Member USA 46 Posts	Posted - 14 Aug 2003 : 16:50:55 This problem is very common, as Jag says. Do a google search for simasimac, and you'll find a site or two devoted to explaining its causes and possible cures. It's not an analog problem; it's a logic board problem, folks! Easy things to try: Remove and reseat all memory cards, and all connectors. If that doesn't do it, you probably have some bad capacitors. Look on the logic board for tell-tale stains around the electrolytic caps (small silvery can things). If you see such stains, that's it. The pram battery can leak, too, causing similar problems. If the gook hasn't eaten the pc board traces, cleaning might do the trick (as well as replacing the leaky caps). If the traces are eaten away, you can pretty much kiss it goodbye. It's not worth fixing, unless you have LOTS of free time, patience and skill.

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