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Grazhve

macrumors newbie
Original poster
Apr 5, 2013
1
0
Imac g5, 1,8 powerpc, 160gb, osx 10.5.8
Problem :
1 when i press first time power button, loads about 15 seconds and immediatly turn off.
2 when i press second time power button, loads about 25 seconds and immediatly turn off.
3 when i press third time power button, loads and work computer all day without problems. Reinstall osx not help. Run apple service diagnostic disk all test passes.
 

rabidz7

macrumors 65816
Jun 24, 2012
1,205
3
Ohio
Imac g5, 1,8 powerpc, 160gb, osx 10.5.8
Problem :
1 when i press first time power button, loads about 15 seconds and immediatly turn off.
2 when i press second time power button, loads about 25 seconds and immediatly turn off.
3 when i press third time power button, loads and work computer all day without problems. Reinstall osx not help. Run apple service diagnostic disk all test passes.

Your iMac may have the capacitor plauge.
This is when capacitors explode,leak, or bulge due to bad manufacturing.

Check your motherboard and power supply for bulging, leaky or exploded capacitors.
This sounds like the PSU has the capacitor plauge.
 
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