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Acer ED270R no display/black screen, backlight is on and Win11 recognizes
Hello all, first post here as a newcomer to the industry, trying to repair and flip some bad monitors. I have successfully repaired a couple bad IC LG monitors and car electronics so I know enough to be dangerous but some concepts are still unbeknownst to me, so bear with me. I have 2 Acer ED270R's with the same problem, and one good Ed270R with a cracked screen but functions normally as a tester/donor.
The issue:
These monitors will both power on and illuminate the backlight but will not display an image, including the splash screen. If you plug the unit into a computer on any port it will react and stayed powered on with a good backlight continuously as well as be visible and usable in Windows. Changing settings like res/Hz will cause the display to power off briefly like normal behavior. Yet there is never an image.
Some searching only shows that this is a frequent issue with these monitors but I can find absolutely nothing about repair attempts or service manuals. Swapping the power boards from the good unit yields the same results, so my guess is it's an issue on the tcon/video driver board that attached to the LCD via 4 soldered on ribbon cables. No swapping that board since you can't swap those ribbons. Where to start here? Bad caps? Bad firmware? Check for shorts? Thanks for any and all input.
The issue:
These monitors will both power on and illuminate the backlight but will not display an image, including the splash screen. If you plug the unit into a computer on any port it will react and stayed powered on with a good backlight continuously as well as be visible and usable in Windows. Changing settings like res/Hz will cause the display to power off briefly like normal behavior. Yet there is never an image.
Some searching only shows that this is a frequent issue with these monitors but I can find absolutely nothing about repair attempts or service manuals. Swapping the power boards from the good unit yields the same results, so my guess is it's an issue on the tcon/video driver board that attached to the LCD via 4 soldered on ribbon cables. No swapping that board since you can't swap those ribbons. Where to start here? Bad caps? Bad firmware? Check for shorts? Thanks for any and all input.
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