I bought G5 (2003, A1047, Dual 2.0), which was sold as defective - Previous owner told he does not have any idea why the mac does not power on.
I bought it for a few bucks just for fun.
To my surprise, the mac instantly turned on when I first powered tried and pressed the power button. I turned it off and on - everything worked prefectly. Played around with OS X 10.5 for a while, unplugged the mac from power cord...Next day it powered on again without any issues and I kept it on for few hours.
I did not had time to test it again for a week or so.
Today I tried to power it on again. Connected power cord - heard 2 clicks (that is probably a normal behaviour). Pressed the power button - heard one click/the light went on for a split second/off, and nothing more happens.
When I keep pressing the power button the light is on untill I release it, but nothing else happens. Upon a repeated single press I hear a click again but the machine does not power on.
When the lid (and plastic) is off - I see that fans try to start but instantly halt as the power is cut.
Red light inside the case blinks for a short time as well when the plastic cover is off (It should be on when the plastic is off - normal).
I started to think what was the factor the mac switched on for two days in row. Even after the power cord was disconnected...
It was brought to me in cold weather. Placed it near open window for a while (10 minutes or so). Did not work. Maybe have to try for a longer time.
Reseated RAM, tried different ramsticks - no go.
Resetted SMU, took out battery - no go.
Heated memory area on the motherboard with a hairdryer as I red that memory controller might be faulty - no go.
Out of curiosity... I want to find out the issue...
Any ideas? Can it still be the psu...Even if there seems to be power supplied for a split second?
Something stops it from booting...and the power is cut off...
I bought it for a few bucks just for fun.
To my surprise, the mac instantly turned on when I first powered tried and pressed the power button. I turned it off and on - everything worked prefectly. Played around with OS X 10.5 for a while, unplugged the mac from power cord...Next day it powered on again without any issues and I kept it on for few hours.
I did not had time to test it again for a week or so.
Today I tried to power it on again. Connected power cord - heard 2 clicks (that is probably a normal behaviour). Pressed the power button - heard one click/the light went on for a split second/off, and nothing more happens.
When I keep pressing the power button the light is on untill I release it, but nothing else happens. Upon a repeated single press I hear a click again but the machine does not power on.
When the lid (and plastic) is off - I see that fans try to start but instantly halt as the power is cut.
Red light inside the case blinks for a short time as well when the plastic cover is off (It should be on when the plastic is off - normal).
I started to think what was the factor the mac switched on for two days in row. Even after the power cord was disconnected...
It was brought to me in cold weather. Placed it near open window for a while (10 minutes or so). Did not work. Maybe have to try for a longer time.
Reseated RAM, tried different ramsticks - no go.
Resetted SMU, took out battery - no go.
Heated memory area on the motherboard with a hairdryer as I red that memory controller might be faulty - no go.
Out of curiosity... I want to find out the issue...
Any ideas? Can it still be the psu...Even if there seems to be power supplied for a split second?
Something stops it from booting...and the power is cut off...
