HCM780M
Power is autoamatically switched off and comes back after 8 or 10 hrs later in the monito

I am using a HCL Computer with monitor HCM 780M . It has a problem related with the monitor. While working the monitor switches off automatically. After 8 or 10 hours its switches on. Again it goes off when working 1 or 2 hours and switches on after 8 or 10 hrs. Please help to solve this problem. Is the circuit of the monitor available. Who was the publisher of the circuit diagram? How to solve this problem. I request from monitor technicians.