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Have you used DDU to completely remove the graphics driver & clean install it?
Official Display Driver Uninstaller DDU Download
Have you used DDU to completely remove the graphics driver & clean install it?
Official Display Driver Uninstaller DDU Download
I can only thing that the TV is rated for 115v or something else & as Egypt uses 220v there isn’t enough power.
Egypt - Power Plugs & Sockets: Travel Adapter Needed?
I didn't read all the other posts but you are driving the 144Hz with much more data per second than the 60Hz monitor. I had a similar issue and it turned out it was the cable. I was exceeding the spec of the cable and what happens is the data gets corrupted and the monitor just rejects it, going blank for the duration.