I was setting up my. I was setting up my ps3 for playin a game online, when the ps3 unit shut down

Question

I was setting up my ps3 for playin a game online, when the ps3 unit shut down and flashed red at the front of the console. so i read the saftey and support book for the ps3 and it said it has over heated, so let it cool down and start it up later.... so its been 16hrs since then and when i go to start it up again it still flashin red and the console wont turn on.. does any1 know wat to do or could ther be another problem?