PC is running but monitor doesn't

[zzeven]

Monitor makes a short beep then repeats. After a while (1-2 hours) it makes a longer beep.After that im shutting down the PC and then the monitor runs to. What's the problem with it?

 

[zzeven]

Yes im looking for a new one in like 120-130 $

 

[Aofekiko]

Yes im looking for a new one in like 120-130 $

for now try doing what i tolled you, tell me the results, in the wors case you will buy a new monitor.
http://www.tomshardware.co.uk/top-best-computer-monitors,review-33059.html
use this to find the best monitor for you, the monitors here are very high end gear and quite expensive but it will help you understand what monitor you need.