Mac Booting with Prohibitory sign

[Klaymator14]

Hello all, after about a week of using Snow Leopard, whenever I restart my mac, it starts up with a prohibitory sign, or a circle and a line through it. So then I have to reinstall Snow Leopard, and whenever I restart it after that, it always does it. But it won't do it if I restart it after a software update, specifically OS updates. This didn't fix it when 10.6.2 came out, and it's very frustrating. Anyone know what's wrong?
Thanks!

-Blayke

 

[Sun Baked]

Utility/Disk Utility/Repair Permissions

and for good measure verify the drive while there.

and then try

System Preferences/Startup Disk ... reselect the startup Disk

The zap PRAM on restart (Press and hold the Command-Option-P-R keys on restart, let it bong three times and release).

---

Permissions sometimes get out of whack after a system update, install ... if the startup disk isn't registering properly, it can cause a few issues on restart ... zapping PRAM makes sure all startup items in PRAM are reset.

 

[Klaymator14]

Nope... it still does it. Any other ideas?

 

[otter870]

same problem here

I am having the same problem and have done all these fixes and even a complete erase and reinstall and it is still doing it.... i would love to know what is causing this... could it be hardware related?