Problems with my 2 iMac G4

Hello,

I have inherited seven iMac G4s, two of them 17 inches.

As I don't have much experience in computer repair, I would like your advice.

The first, when I plugged it in, there was only the ventilation as a sign of life, so I unplugged it and dismantled it.

I removed the two ram strips to see if that would change anything, then I removed the non-essential internal peripherals (hard disk, cd drive).

All my manipulations didn't change a thing, the result was the same as at the start, simply a black screen and ventilation...

For the second one, I did the same thing, but again, nothing changed.

The symptoms are: when I press the power button, the fan runs for about a second and then nothing after that.

Have a nice day!

Amaury from France