I have a problem on my PowerMac G4 (M8570)

[TheCreeper_]

I have a PowerMac G4 model M8570 and when I try to turn it on, the fan and the DS18 light turn red, but there is nothing on the monitor and no Apple’s classic startup chime. The hard drive turn on but there is nothing on the screen, it’s not showing me life.
I checked for the BIOS battery but it still have energy on it. But actually, like 6 month ago, it was working fine. If someone knows what this is about, please tell me because I have a project with it that is really important.
Thanks. (yes, i checked and all the video cables are conected)

 

[Dronecatcher]

Have you tried resetting the PRAM? Reboot whilst holding down cmd/option/p/r and let it reboot 3 times whilst holding.

 

[TheCreeper_]

I just tried but it does nothing.

 

[Dronecatcher]

Try removing the graphics card, clean the contacts and reseat it.

 

[TheCreeper_]

Nope, nothing

 

[Dronecatcher]

HAve you tried with the PRAM battery removed? HAve you tried booting into Open Firmware (cmd/option/o/f)?

 

[TheCreeper_]

Nope, still nothing.

 

[z970]

*breathes deeply*

"Open sesame!"

-

...Did it work?

 

[Dronecatcher]

It's maybe a power supply issue - the MDD models are the worst for this and the symptoms aren't exactly logical.

 

[Project Alice]

It's maybe a power supply issue - the MDD models are the worst for this and the symptoms aren't exactly logical.

That was my first thought once seeing it was an MDD.