Powermac g4 will not turn

How do you get it to kick in ?.Fid you spin it by hand ,if that's what you did and fan runs then you have a bad capicator. If fan runs fine in cooling and not in heat then you have a bad board

Hope this helps your out. I know the diagram and locator is a bit blurry but hopefully it gets what you need.
Drivers kick panel:
Front wiper 20A - Front wiper system Cigar 15A- Cigarette lighter Audio 10A- Audio, remote control mirror Air Bag 10A -Air bag diagnostics Stop lights- 15A -Rear brake light, high mounted stop light ECU B+ 10A - Shift lock actuator, transaxle controle module, radio, engine control module Room 10A - Interior light, clock, ignition key reminder, rear cargo area light switch ABS 10A- Anti lock brake system control unit ECU IG1 10A - Transaxle control module, shift lock actuator, ABS control unit, DRL unit Meter 10A - Instrument panel, back-up switch, electronics time control module, inhibit switch Turn signal 10A- Hazard switch ,front and rear turn lights, turn indicator IGN1 20A - Ignition switch ABS 30A- ABS pump motor TNS 30A- Tail light, license plate light COOL/FAN 30A- Cooling fan Cond/Fan 20A- A/C condenser fan Starter 15A- Start signal , Fuel pump Blower 25A- Blower Motor SR/ACC 10A - Ignition switch Hazard 15A - Hazard and turn signal light D/Lock 25A- Door locks ABS 30A - Anti lock brake system control P/W RH 20A- Power window motor right hand P/W LH 20A- Power window motor left hand IGN2 25A- Ignition Switch
Engine compartment :
Head 25A- headlights IG 2 30A- Ignition switch IG coil 15A -Ignition coil, condenser,generator IC regulator, diagnostic connector. O2 down 10A- Rear O2 sensor O2 up 10A- Front O2 sensor Fuel pump 10A -Fuel pump unit Injector 10A -Fuel injector ,camshaft positioning sensor, purge solenoid valve, EVAP, IAC actuator, Mass Airflow sensor, EGR stepper motor. fuel pump relay coil, vehicle speed sensor. A/Con 10A - A/C compressor controls, cooling fan BTN 30A- Brake light , high mounted stop light. Tail light LH 10A- License plate light, tail light , rear combo light, instrument panel illumination Tail light RH 10A-License plate light, tail light , rear combo light, instrument panel illumination Head low 15A- Headlight Head Hi 15A-Headlight Horn 15A- Horn

Inside kick panel

None of the parts are usable in any other machine.
The coolant from a liquid-cooled G5 PowerMac is toxic. If your G5 is leaking, disconnect the power cord IMMEDIATELY. Flush any skin exposed to the fluid with water for at least 15 minutes.
If you want to glove up and extract your hard drive from the machine so as to save your data, do it carefully. Other than that, my recommendation is to bag up the unit and handle it responsibly as toxic waste, using the same guidelines your area uses for antifreeze.

Hi, the wiring terminations are near consistent with a 24 volt ac furnace and I will tell you how a 24 volt stat is terminated. RC= 24 volts jumped to RH for red wire only. This would be for a central system with air and heat. W=white for heat, G= Green for Fan, and Y = yellow for cooling. I do believe it is wired correctly for your application. Please verify your units model and serial number and give me a clue as to what is taking place, and did you change the thermostat or make a part change?
Sincerely,
Shastalaker7
A/C, & Heating Contractor.

OK it's a G4 iMac.
Burning smells coming from macs often indicate a failure in the power supply module. That said, the G4 iMac (in my experience) has been the most reliable iMac ever and power module failures are very rare.
Your best option is to find a Mac repair centre near you and take in in for a quote. But be warned - it will cost. For some reason known only to Apple power supply modules are expensive (but not as expensive as the equivalent volume of HP ink) and replacing them is not as easy as on many of the other computers.
If it is the power supply, you will not be able to switch it on again. Your data on the HD should be safe (unless the smell was coming from that - - I've had it happen!). So when you get to the workshop and you've had your quote, if you decide not to go ahead with the repair, ask the workshop to remove your HD and put it into an external case so that you can plug it in to another Mac and continue using it.
Let us know what the outcome is.

to mount somthing in a mac is basicly cutting it on for use.
'
For example if you instal a flash drive or an hard drive via an out side connection, The mac will mount it so you can use it.

The thermostat is the controller.

The motherboard might be shot would be my guess.

The video card you used may work for the 2nd computer but not for the 1st because of the system requirements. They might be different simply because they are different models. check which video card is RECOMMENDED, NOT MINIMUM, and get the recommended video card.
However, if it is the right video card, then get it checked at a pc shop, like pcworld or somewhere like that and see what they think of it.

try adding pci slot fans to keep it cool. You can find them on ebay and places newegg.com or any other computer place