HI Experts,
I have a Dell IN2020M monitor purchased almost 3 years ago. I have been facing a strange problem off late.
The problem is as follows:
The monitor works fine when I boot my system, However after 30 mins or so (sometimes even before that or sometimes it takes hours for the issue to come up) it goes off. I mean the white power light is gone and it seems the monitor is not taking any power. To bring it up again I need to switch off the power connection to my monitor for about 10-15sec and then turn it back on, the monitor starts normally after this step. Then again the same thing keeps happening every 5- 10 mins and I got to repeat the power off - on step to bring my monitor back to life.
My monitor used to work fine till this point. However I am not sure if my certain hardware changes are causing this issue or the monitor it self is faulty. I say this because my friends monitor works perfectly fine at my place and mine works fine at his place. Hence I am not sure if there is some compatibility issues of the monitor with my motherboard or graphic card as I have recently upgraded them.
The new upgrades to my system are these:
Motherboard: P8Z77-V LX
Graphic Card: Sapphire 7770OC
Please let me know a solution for this as its very frustrating and tiring to work this way. 
Thanks.