no video signal

hi all, I have this PC bought around 4 mos for my 6yrs old daugther.
PC mobo is MSI P4M800-M2, 512RAM, 80GB HDD, DVD drive, PSU 450watts, Monitor is Syncmater 19inch. After i transfer the PC from our leaving room to her room, suddenly i got this message "No Vedio Display". I try to connect the cables properly and secure it but i still got the same problem. By the way i am using the onboard.

 

Were you using the same video card / monitor setup before the move?

 

Yes, I am still using the onboard and i did'nt use any PCIE or AGP video card.

 

Check all the cables inside, and reseat the RAM and any cards attached. Also check the CPU cooler is firmly attached, and hasn't come loose in transit.

 

Thank you for your reply. And sorry for late response. So far what i have done is i remove the mobo, attach the hard drive and one stick RAM with the power supply and switch on, but no beep and no video signal and here is one thing i found out that my hard drive is not working but when i switch off and remove the connection from the PRI IDE the hard drive gets enough power to operate. I am realy out of option right now and want to resolve this problem. Please help me. And thank you in advance for your help.

 

Perhaps try another IDE cable?

 

I have tried PRI and SEC IDE but it won't work. I think I have to check the PSU wattage and my mobo. Anyway thank you for all your reply.