2007 MacPro Won't Boot

[RogersDA]

I installed Lion the other day with no problems, and there has been at least one time that I shutdown the computer completely (not related to Lion).

Today, I let Firefox update itself to ver. 5.

After doing that the Firefox stopped responding, and I started quiting programs. I had to force-quit firefox. I then rebooted the computer.

All I get is the sound of the video card fan in high-speed mode, and there is no signal to the monitor. The computer does not appear to boot any further despite repeated attempts.

SMC, PRAM resets (pulling the power cord from the back) did nothing.

Any other ideas?

 

[derbothaus]

Hold down option key at boot. Do you get a HD on the screen to choose?

 

[RogersDA]

Hold down option key at boot. Do you get a HD on the screen to choose?

Worked. Thanks.

 

[RogersDA]

Now it happened again. Pressing the option key does not allow the boot partion selections to appear.

All I get is a high-speed fan noise.

 

[derbothaus]

Do a PRAM "zap".
On boot right after "Gong" startup sound hold down command+option+p+r for 3 boot chimes then release.
If it still wont find the drive you may need to boot from your factory install disc or OS disc or a recovery partition (thanks lion) and repair the hard disk with disk utility.