[VIDEO WARNING , FLICKERING / BLINKING / FLASHING LIGHT]
Hello, I've got a Benq XL2720-B 144hz monitor that was manufactured in April 2014, that started having a flickering issue quite a while back now. Recently I picked the monitor back out of storage to try and figure out if I would throw it out or attempt to fix it somehow.
The issue started out of the blue one day and I was not able to resolve it, I tried a different power cable, updated drivers, changed refresh rates, reset to factory settings both on the monitor and by unplugging and unplugging then holding down the power button for 10~20 seconds, then waiting around 20 more seconds after that.
I've tested it on another PC but I think something else was done wrong, as it didn't work at all (Connected through HDMI).
Any well versed tech person aware of what is the most common cause for this issue and how it could be fixed, if it is worth fixing it and what it would cost to attempt a repair at home?
The monitor is old and there's obv signs of wear on it, such as the dark spot at the bottom and brighter at the top for what ever reason.
More detailed info on refresh rate tests:
Tested 144,120,90 and 60~ Not exact refresh rates.
(Also tried different resolutions and it didn't help either)
050820232040199120230805_203045_out.mp4