G5 power up problem

if the computer is OFF for 4 hours or more then the Mac frooze at startup: no screen, no USB
mhz wrote on :

G5 2mhz tower Turning ON the Mac after 30 minutes is OK but if the computer is OFF for 4 hours or more then the Mac frooze at startup: no screen, no USB (the mouse don't light ON). I must reset (holding down the front button 5 secondes) to boot correctly.

However if the G5 is not only turn OFF but the AC cable unplug the Mac boot perfectly.

A similar problem happen when the computer go to sleep for more then 30 minutes: the mac frooze, no screen, no mouse.

Any suggestion will be appreciate.

Warren Oates replied on :

In article none-46ED82.07323429042007@redacted.invalid, mhz none@redacted.invalid wrote:

G5 2mhz tower Turning ON the Mac after 30 minutes is OK but if the computer is OFF for 4 hours or more then the Mac frooze at startup: no screen, no USB (the mouse don't light ON). I must reset (holding down the front button 5 secondes) to boot correctly.

However if the G5 is not only turn OFF but the AC cable unplug the Mac boot perfectly.

A similar problem happen when the computer go to sleep for more then 30 minutes: the mac frooze, no screen, no mouse.

Any suggestion will be appreciate.

Dead battery maybe?

Mac Guy replied on :

On 2007-04-29 06:32:34 -0500, mhz none@redacted.invalid said:

G5 2mhz tower Turning ON the Mac after 30 minutes is OK but if the computer is OFF for 4 hours or more then the Mac frooze at startup: no screen, no USB (the mouse don't light ON). I must reset (holding down the front button 5 secondes) to boot correctly.

However if the G5 is not only turn OFF but the AC cable unplug the Mac boot perfectly.

A similar problem happen when the computer go to sleep for more then 30 minutes: the mac frooze, no screen, no mouse.

Any suggestion will be appreciate.

======

http://docs.info.apple.com/article.html?artnum=86760

Jolly Roger replied on :

On 2007-04-29 07:07:12 -0500, Warren Oates warren.oates@redacted.invalid said:

In article none-46ED82.07323429042007@redacted.invalid, mhz none@redacted.invalid wrote:

G5 2mhz tower Turning ON the Mac after 30 minutes is OK but if the computer is OFF for 4 hours or more then the Mac frooze at startup: no screen, no USB (the mouse don't light ON). I must reset (holding down the front button 5 secondes) to boot correctly.

However if the G5 is not only turn OFF but the AC cable unplug the Mac boot perfectly.

A similar problem happen when the computer go to sleep for more then 30 minutes: the mac frooze, no screen, no mouse.

Any suggestion will be appreciate.

Dead battery maybe?

Yep. I was thinking that or PRAM/PMU needs to be reset.

mhz replied on :

In article 463488d0$0$30502$c3e8da3@redacted.invalid, Warren Oates warren.oates@redacted.invalid wrote:

Dead battery maybe?

I guess no since date and time work fine...

Jolly Roger replied on :

On 2007-04-29 19:23:43 -0500, mhz none@redacted.invalid said:

In article 463488d0$0$30502$c3e8da3@redacted.invalid, Warren Oates warren.oates@redacted.invalid wrote:

Dead battery maybe?

I guess no since date and time work fine...

Maybe it's not dead yet, but is low enough in voltage to cause malfunctions - quite possible. Anyhow...

Did you reset PRAM?

Did you reset the PMU?