System Failure - corrupt stack

Hi Sheryl,
i really doubt this has anything to do w/ your ISP changing...

actually, i suspect bad RAM. did you add RAM to your machine at any point?

either way, you could test your RAM and rule out my guess....
some options:

- run the Apple Hardware Test in extended mode. the general consensus though is that that the AHT does not completely check RAM. but in your case this test might find the actual problem if it's not your RAM.
http://docs.info.apple.com/article.html?artnum=50140

- head on over to http://www.memtestosx.org/ and use that app. costs $1.39 ⚠

- try rember

post back w/ any news... good luck!


MBP 17/2GB/7200/matte, dualG51.8, G4 450, TiBook, beige & B/W G3s, & a Quadra! Mac OS X (10.4.8)

When I bought the iMac I had 2 512 chips. Now when I check it - it says I
have 1 512 and 1 256. Where did the other half of that chip go...or is this
my problem?
Thanks

well - that certainly is suspicious... let's see how the test goes, but from your reply this smells like a RAM problem even more now....

if true, you'll need to replace that stick. might be worth considering replacing them both. depends on how much money you want to spend....

depending on what you you use your machine for, this might be the right
time to increase your total RAM (i.e. 2 512MB sticks -> 2 1GB sticks). again largely a question of need and finances....
cheers..

p.s. oh BTW - if you do need to buy one or more new sticks, friends don't let friends buy dirt-cheap RAM.... go for a reputable manufacturer (crucial, micron, hynix etc).... w/ a little research you can buy it on-line at a discount... good luck

hi sheryl,

even if the sticks passed the test, if they show 512+256 not 2x512 when you know they should be 2x512, then i still think the RAM is suspect.
return or replace that stick....

cheers

hi again sheryl,
i suppose it should be logged in the console. the entries there are timestamped. if there's some correlation w/ starting java, then look for timestamps in the console log at about that time.

but again, "the stack" is an object in memory.
corrupt stack -> corrupt memory -> bad RAM.

such issues can show up in wierd places since every app (& java) uses memory.

let's do this. pull one stick. close up the machine and reboot. see if the problem still exists. then pull the remaining stick and replace it w/ the other stick. close up and reboot.
http://docs.info.apple.com/article.html?artnum=95144

if the problem in indeed a bad ram stick, the problem will disappear when that stick is no longer in use....

cheers

I keep having the same system failure, cpu=0, code 00000001
(corrupt stack). After Rember gave me "All tests passed", I tried Apple Hardware Test, which also passed everything, except at the end. After Video RAM I got ERROR Code 2NVD/1/4:2119.
What should I do now?
My computer (G5 dual 2.5) does start up when the shift is down.