Replacement Power Supply iMac G5 iSight PPC 20" 2.1 Ghz
The iMac had problems restarting and turning off and on again after a long period of activity. The team was sent to restart and it did not reach it, after hearing the beep on, the team came down and off. Also to turn off, had to wait about 10 minutes to get back on. The team had síntomes significant energy loss, which led me to believe that the power supply was damaged.
After replacing the power supply, the team showed great improvement over the boot much faster and without any noise but the problem continued to a lesser extent. What took me back to disassemble the iMac to do a thorough cleaning of the heatsink and apply new thermal paste to the CPU. After doing all this, the team had enos symptoms but as the team was working again present the same fault sometimes. Which leads me to think that the logic board is damaged. But after all these steps, the team works seamlessly in the absence of these minor inconveniences.
I recommend everyone iFixit parts and especially their guides. Thanks to them I managed to remove and replace my iMac without any problems when at first it seemed impossible.