Boot issues with PowerMac G5

Hi from france,

My early 2005 powermac G5 has troubles, I looking for help everywhere..

Sometimes G5 boots, sometimes not. I don't understand.

So, I switch the tower: fans power on, no chime, blacks screen, sometimes, white led illuminates, I don't hear hardrives research. Keyboard don't respond too, unable to open dvd drive in order to try "AHT".
I tried to move the 6x1go ram slot, well replaced: dc ba ab cd
I tried reset "PMU", disconnect graphic card, hardrives, power cord, no change..

And I forget to say, sometimes, I can't reboot the system: I must shut down completely and wait few minutes, to restart.

Please can someone help me, cause I need my G5 to work unfortunately

Thanks

One quick question...when was the last time this Powermac G5 was internally inspected for dirt/fuzz...and if it was dirty...was it cleaned?

Powermac G5 fans & cpu heat sink cooling fins can get very dirty.

- Nick

No idea, I bought this used G5 in 2009.
I clean sometimes with vacuum, blow dirt in the fans etc, but never disconnect cards power supply and processors: I don't know how to do.

biquet82 said:

No idea, I bought this used G5 in 2009.
I clean sometimes with vacuum, blow dirt in the fans etc...

Click to expand...

Your answer is a bit confusing. I asked when was the last time you cleaned this computer...and you replied..."No idea" and "I clean it sometimes". So I'm really not sure what to think.

If a Powermac G5 is dirty...it's cooling system will not be working properly. And if the computer is over-heating...this can cause problems similar to what you're experiencing.

I'm not saying that your computer IS dirty. What I'm trying to figure out is...IF...it is dirty. If it is NOT dirty...then we can move onto other ideas.

But there is no need to try other things...if poor cooling (due to dirt/fuzz) is the problem.

- Nick

OK, sorry, I understand, no problem;
I don't know if the last owner of the G5 clean it seriously, but I clean it regularly since I owned it.
I don't take to pieces the G5, because I don't know how to do.

So please can you tell me how can I clean the cooling ?