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Weird 27" IMac Resolution Problem
Apr 4, 2022 11:58:40   #
mflowe Loc: Port Deposit, MD
Hello all. Recently I was doing my weekly cleaning and I bumped my Imac right around the Apple logo on the bottom. Didn't seem like that much of a tap. Instantly the screen started blinking sporadically. My first instinct is always to turn something off and then back on. When I turned it back on, the startup screen was very noisy and I couldn't see the Apple logo. When it booted up, the blinking was gone, but a more serious problem presented itself.
Everything looked twice as large and it looked like the resolution was halved. The edges of everything, especially text, was rasterized.
When I go to System Preferences or About This Mac > Displays > Resolution, it shows "default for display". When I go to About This Mac> Displays, it shows resolution as 1280x720. If I go to System Info > Graphics/ Displays it also shows resolution as 1280 x 720. My Mac is quad hd at 1440 I think. NVIDIA GeForce GTX 675 MX, iGB Vram.
Any ideas? Graphics card maybe? Since the ram door is close to where I bumped it, I reset the ram. That fixed the noisy logon screen but not the resolution. Is there anything in settings somewhere to adjust the resolution?
Thanks in advance for any help.

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