what does red screen mean?

Is this what you mean > http://support.apple.com/kb/HT1212

The Basic Troubleshooting Steps are:

Restart... Reset... Restore from Backup... Restore as New...

Restart / Reset

http://support.apple.com/kb/ht1430

Backing up, Updating and Restoring

http://support.apple.com/kb/HT1414

If you try all these steps and you still have issues... Then a Visit to an Apple Store or AASP (Authorized Apple Service Provider) is the Next Step...

Be sure to make an appointment first...

Most likely a hardware issue. You have a 1 year warranty... take it in to Apple and let them look at it.

I got red screen and then followed instructions to force restart. Got black screen with Apple logo and several lines of computer jargon at the top.