Question Display keeps going black for few seconds then back on

Apr 14, 2020
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Hi,
i have a i3 4150 and gtx 750ti/gtx 1060
i am experiencing black screen ever so often (its very irregular in occurrence )
sometimes longer duration of blackscreen leads to monitor displaying a message - out of range ( very rare)
but mostly it just goes to a blackscreen for 1 second and then comes back on
monitor - benq gw2270

Things i have tried to fix this :
1.clean install of gpu drivers
2.tried different monitor
3.tried different hdmi cable
4.tried different GPU
5.replug all the cables

none of the above fixed the issue
monitor stays on while the black screen

i cant seem to solve the problem