Hi, I'm Sandy and I look forward to help you today with the best answer possible.
I'm sorry about the issue.
I will work with you until it gets fixed. This is a question and answer session. Please do not hesitate to reply back to me at the box given below.
Is this acer hdmi monitor connected to your laptop or desktop computer? Please let me know.
I'm sorry about the issue. Does your desktop have Windows XP, Vista, or 7 or 8 or 10?
Is the desktop currently working fine with another monitor? If yes, does that monitor connect to the HDMI port or the DVI port or the VGA port on the desktop?
Can we do a remote support session, so I can troubleshoot the issue directly on your computer together with you?
Please reply at the box below. Thank you,