– aword of caution to others – don’t try this when you have been drinking. Though it could have been a combination of the other things I did. REPLACED THE BATTERY (Cr2302) –this last thing seemed to get the machine over the line, that is, to boot.
Took out the ram (2* 512mg) and reinserted each one. Once connected The machine would chime and then nothing. The machine had sat idle for 10 months and had had the HDD removed. Had a few teething problems getting the machine to boot. Also have to check over how I wired the ATX extender cable. I’m thinking that the bigger PSU my have more grunt. used your diagram and the machine boots which is great. not sure everything is wired up correctly as well. the lcd is not working but I am using an external monitor and that is working fine.
Power supply for mac powerbook g4 Pc#
I just hooked up a PC 200watt PSU to my 20″ pre-isight power pc model imac g5. Online people are suggesting that it “works” to grab a 12V line and bring it in to the connector, though possibly improper. The iMac has a very odd ATX style pinout, and further research is needed for proper grounding use. If you grab a 12V wire, it’s good to utilize it’s ground wire instead. 17″ models seem to do ok with the 12V, though would be still putting excessive strain on the inverter board.Įdit: On grounding, It is good to instead use grounding that is on the same rail as what is coming from the power supply. Our G5 20″ prototype machine is really solid right now, except without the voltage up-converter the backlight stutters ever so slightly. There is a -12 V line that some one might try to use with the +12 V line to achieve the 24 Volt difference, THIS IS NOT RECOMMENDED for the backlight inverter. This might bring the total cost in parts to 30 $. What we are looking at is getting an additional 12V->24V 3 amp up-converter.
The big trick (and maybe your not this far yet) is getting a 24 Volt line (for the LCD inverter, Firewire) from an ATX power supply. The 12V can be taken from any wire that is yellow generally. A ground is a ground no matter what, grab one from anywhere that’s not being used.
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