PC problem powering up

Hi guys, i really gave up on this. I got an Asus mobo i just bought in aug 2003, can’t remember which model, a P4 2.8 ghz with 512 ram, a 128 mb ati radeon 9200. I woke up this morning finding my PC dead. Couldn’t power up, then I remove the PSU and open it up and I see burnt resistors or watever you call it on the boards. So I went to buy a new PSU, i bought a black cube 450 PSU. Brought it back, put it in. Still doesn’t boot up. The mobo light is on (green light). It just blink once when I press the power on button. Hope someone can help. I got a friend who tell me it could be some parts of the mobo is fried. But i just want to confirm before i bring it to the shop to fix. Thanks and Merry Christmas