Display not coming in HP dv 2419 us

Hi ,

I am having HP DV 2419us Laptop. sometimes when i am powering on , Display is coming , but whenever i am shutting down my laptop and after that when i m again trying to open , all lights are showing but display is not coming , if i am trying after 2 to 3 hours again then it is working fine . but after shtuuing down the problem is same .

Please help me out as warranty has been passed .