crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2861143:0crwdne2861143:0

This Power Mac G4 has Mirrored Drive Doors.

crwdns2934591:080crwdne2934591:0 crwdns2934593:0crwdne2934593:0

crwdns2933897:0crwdne2933897:0

Why won't Power Mac G4 MDD power-up without cycling ac power?

Pushing the power-on button won't start the computer, as it should, unless the ac power is cycled first. What's the cause and what's the fix?

crwdns2934081:0crwdne2934081:0 crwdns2934083:0crwdne2934083:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 -1
crwdns2934285:0crwdne2934285:0

crwdns2933313:01crwdne2933313:0

crwdns2934221:0crwdne2934221:0
crwdns2931211:0crwdne2931211:0 crwdns2931215:0crwdne2931215:0 crwdns2934225:0crwdne2934225:0
crwdns2934051:0crwdne2934051:0

crwdns2933897:0crwdne2933897:0

Some things to try - press the PMU reset button, check/replace the PRAM battery, check PSU

crwdns2934105:0crwdne2934105:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 1

crwdns2944067:03crwdne2944067:0:

The PRAM battery looks to be in this GUIDE - step 5

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

I did (prior) replace the "clock battery". Is that the PRAM battery? I did not try the PMU reset button.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

Yes - the PRAM battery also powers the RTC (real time clock) so if that is flat the date/time will be wrong

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0

crwdns2934229:0crwdne2934229:0

guytonp crwdns2934231:0crwdne2934231:0
crwdns2936625:0crwdne2936625:0:

crwdns2936751:024crwdne2936751:0 1

crwdns2936753:07crwdne2936753:0 3

crwdns2936753:030crwdne2936753:0 4

crwdns2942667:0crwdne2942667:0 936