[sknapp351]

Hey everyone,
Came home tonight and my fiancé's G5 wont start up. We had power go out earlier apparently and this was the first time we had been home and needed the computer. When I push the power button there is a single internal click and the light above the power switch flashes once....then nothing. Dead. We are in the last weeks of our thesis in our senior year of college, and this is really crappy timing. She just had the power supply replaced in December. Any ideas would be great, I know on the old G4 I had to reset the pmu via a button on the logic board. Can't find one here, and don't want to screw anything up.
Thanks,
S

Dual 2.0ghz G5
8GB ram, installed with computer purchase 1.5yrs ago
2 x 250GB hds
Raedon 9800 pro 128mb
10.3.8

[Big Mac]

Congratulations on future prospective marital bliss. You may need to reset the PMU by pressing the small button located on the logic board. Others can provide more explicit directions - I have never had to do a PMU reset. For some reason Apple does not post specific instructions on the G5 PMU reset in the Knowledge Base anymore and instead tells users to consult their manuals.

[Chito]

If your 2x2 G5 is a late model, June 2004 or after, it doesn't have a PMU. It'll have an SMU, which you reset by unplugging the computer for awhile and then plugging it back in. It'll reset itself. If you've got an earlier G5, like I do, the PMU is located between the Ram slots on the motherboard. I believe you just have to open it up, remove the air deflector, pull the twin fan unit between your ram and processors and give it a press. You may have to hold it for a few seconds, I don't remember. Put everything back together and hopefully you'll be back in business.
FWIW....I haven't had to reset my PMU, but I did note it's location after reading about other owners having to do so. You might want to search Apple's web site for PMU.
edit: ok re-reading I see you've got an early G5. Didn't look at your sig.

[sknapp351]

Thanks for the help. Unfortunately, nothing wanted to work. So the computer is off to the shop. Now have to deal with applecare issues, but such is life. Thanks again.
S

[Big Mac]

Originally posted by Chito:
If your 2x2 G5 is a late model, June 2004 or after, it doesn't have a PMU. It'll have an SMU, which you reset by unplugging the computer for awhile and then plugging it back in. It'll reset itself. If you've got an earlier G5, like I do, the PMU is located between the Ram slots on the motherboard. I believe you just have to open it up, remove the air deflector, pull the twin fan unit between your ram and processors and give it a press. You may have to hold it for a few seconds, I don't remember. Put everything back together and hopefully you'll be back in business.
FWIW....I haven't had to reset my PMU, but I did note it's location after reading about other owners having to do so. You might want to search Apple's web site for PMU.
edit: ok re-reading I see you've got an early G5. Didn't look at your sig.

Interesting, I thought the SMU was only on the new SP 1.8 (Late 2004) as opposed to the June 2004 and earlier models. That is what Apple's Knowledge Base article suggests. But you probably are correct, Chito. I didn't notice a PMU button on my Rev B. DP 2.0 (June 2004), and if it's there it's certainly not between the RAM slots. I guess I should take a look at my manual for confirmation.

[Chito]

Believe me, I'm not an expert. I was just offering what I thought was correct info. This is the address where I read about the SMU.
http://docs.info.apple.com/article.html?artnum=300341
It doesn't mention which models so I assumed that it applied to ALL late model G5's. I do know that my G5 2x2 (pre June 2004) has a PMU. I looked for it when I was installing ram.

[ThisGuy]

edit

[Big Mac]

Originally posted by Chito:
Believe me, I'm not an expert. I was just offering what I thought was correct info. This is the address where I read about the SMU.
http://docs.info.apple.com/article.html?artnum=300341
It doesn't mention which models so I assumed that it applied to ALL late model G5's. I do know that my G5 2x2 (pre June 2004) has a PMU. I looked for it when I was installing ram.

I just assumed that since a) there is the distinction made between (June 2004) and (Late 2004) and b) the SMU only appears to be on (Late 2004) models according to the technote, therefore (June 2004) and earlier Power Macs have PMUs. Users will inevitably run into confusion due to the fact that Apple no longer distinctively names Macs, nor does it provide a precise, standardized way for users to tell which model they own.