Power Mac g4 will not power up

To any one, Moderator, or others,

If I can get this machine to "Repeated-ly" reboot...

Even to blue screen....etiquette wise...should I close the question as solved?

Lets say moving on to a new question....How to get beyond the Blue Screen with spining indator?

Or....How from a cold state..do you force Mac G4 to boot to a utility disk?

Please advise....

Thanks

Nick

1st...thankyou for responding. I am new to MAC, this is my first time diagnosing such a severe issue. i.e. "Power On Button above mirrored doors will not light at all".

1- Located Ser # & site where it is entered...Have all info. you asked. I will check your site suggestions w/ser. #.

Group: PowerMac

Family: 8570, Model : 8840

CPU speed: 1.25 Ghz

RAM: (2) 512 sticks S1 & S2

Production Yr: 2003

2- NO LED on board. motherboard has 1 reset button labeled "PMU" (Have pushed & held it)

3- Have completed Reset of Logic board suggestion, still "won't power up, no fan movement"

4-Have removed ALL modules from MB: 1 module at a time, all the way down to NOTHING, (not even P1 from PSU connected) then plugged in each module...the front Pwer Button still will not illuminate.

5- PSU, P1 connector: In off state, AC power applied, I found only 1 connection haveing 25.5VDC?

Will check & 95038 & TS1367

6- Where can I locate details of P1? ie Pin out with expected voltages especial under AC pwer, static state?

I shall return!

Okay...

Unit sat overnight unplugged.

-PMU reset performed....

-Power ON button illuminated ! ( I am back to 4 days ago)...

1- display of gray apple screen (attempted Command & S , then Command P & R (apear to NOt have initiated anything different)

2- display of blue screen, with mouse pointer (mouse did move pointer)

3-Now mouse gone, unit is at Blue Screen with circular line indicator.

Power is still on....Do you know how to get out of this screen?

Only way to power unit down is uplugging it.

-Addtional notes:

1- a single chime over speakers was heard

2-If I unplug unit....I will be back to the begining

Any other way to over ride & shut down machine...reboot?

Progress!

Performing a PSU button reset, battery removal w/10 minute wait perion, then PRAM resest....make AC pwr connection....

Results in repeatable re-boot! NOTE: makes audbile "ta-da" chime each boot

Okay...I am holding shift button, now 2 reboots no change 😟

Gray Apple Screen, then blue screen with spinning indicator.

This second time...Mouse did not initiate?

(side note: using tool to depress shift key while I am typing)

At this moment: Shift key depressed, (at Reboot), blue screen has spin indicator...

Q. Is there a way to reboot to CD player? & a utility I could burn to disk ???

Thanks for help: BD Aqua & Tex M M

No boot disc. I have contacted the person who gave it to me for anything he may have in the way of SW.

Is there any free-bee on line utilities?

One item of SW I have not mentioned: From the CD player I manually removed a CD labeled "Pro Tech Tool 5.0.1

With some research is this a utility repair disc?

At first I thought it was a Mac "sound" say application for home theater. Have found confilicting information.

If a repair disc....how can I force machine to boot from CD?

I am marking this as sovled.😎

1- Using 10 min. battery removal & PSU & Pram resets is repeatable.

2- CD I found in drive booted using "C" key (even with IBM Kbrd!!)

Pro tech tools is a utility disc. Rather simple at this point I am letting it work it's magic😁

Thank you...excellent venue

Nick

Purpose: Credit due to you too & to speak in "Apple" or "MAC" terminology😎

Reseting the Logic board

This procedure allowed my Power MAC G4 to power, if only to end in Blue screen & repeat.

Finding a CD in the unit Pro Tech Tools & pressing C key during reboot, & physically pushing in CD during reboot (after the system "recognized the IBM keyboard)

Tried during mulitple boots holding various keys:

Shift , Command +S , Command + P + R

These kept going to the blue screen with ciruclar line indicator...or computer is "thinking" as was my first thought of it.

Now to more exploring of ....the world of Apple 😝

Just as earlier...

-Power ON, while lit...does not respond to 10 second hold for forced reboot.

Q: Command & shift key ?

Also...using an IBM keyboard...so.."the windows" key = to "Command" key?