I have had a 24" Benq FP241W since 2007 and apart from a few random and momentary black-outs every few days, and the occasional "rainbow snow" for a second or two, it was working admirably until I put it into cool, dry, dust-free storage for 12 months. Recently I unpacked it and it worked fine for half the day, then suddenly developed a fault with the DVI-D input. I am wondering if anyone has seen anything similar to the situation below, or has any suggestions about what to try next.
My set-up is a 2011 Macbook Pro with an official Apple Mini-Displayport to DVI adapter, and a DVI cable to the monitor. This allows the Macbook (using the discrete video hardware, integrated doesn't support external displays) to drive the display at the full 1920x1200 resolution.
However on the day I unpacked it, after working fine all morning and changing nothing, this configuration just suddenly stopped working. The monitor displays "No Signal Detected!" and the power LED goes to orange when I select DVI-D as the input. Usually the macbook's own display flickers a bit when the adapter is attached, but now it doesn't do anything at all, and OSX shows no additional displays detected.
I've tried NVRAM reset on my macbook, and all sorts of combinations of power-off/power-on/disconnect/connect/factory-reset.
I suspected the DVI cable, so I replaced it - but it did not resolve the issue.
I tried the adapter on another (older, 2008) macbook, and strangely this does detect the monitor and drive it, but OSX doesn't show any information from the monitor (such as model, suitable resolutions, etc) and instead just displays the desktop at 640x480 resolution. Trying to set the resolution to anything else doesn't work - there's no entries in the available resolution list. The display is stuck at 640x480, but at least it's displaying something. It's as if the EDID info isn't being sent down from the monitor, or may not even be there any more. I can set it to 1:1 mode and see the 640x480 desktop in the centre of the screen, or I can disable 1:1 and it auto-scales up to the full 24" display.
I tried an HDMI-MiniDisplayport adapter with an HDMI to DVI cable, and although this cable has worked fine in the past, it didn't work this time with my first macbook. Same behaviour as the other adapter (no signal), and same behaviour on the other mac too (stuck at 640x480).
So I think I've isolated the issue to the monitor itself, although I don't understand the difference in behaviour between the two Macs (maybe they handle corrupt or missing EDID info differently). At this point I'm looking for suggestions on what might have gone wrong. Also, is there a way to diagnose EDID issues on a mac?
I am able to use HDMI via a third-party HDMI-MiniDisplayport adapter, however the monitor only shows 1080 vertical resolution in this case, and looks a bit "off" (antialiasing doesn't work?). However for now it's all I've got.
My set-up is a 2011 Macbook Pro with an official Apple Mini-Displayport to DVI adapter, and a DVI cable to the monitor. This allows the Macbook (using the discrete video hardware, integrated doesn't support external displays) to drive the display at the full 1920x1200 resolution.
However on the day I unpacked it, after working fine all morning and changing nothing, this configuration just suddenly stopped working. The monitor displays "No Signal Detected!" and the power LED goes to orange when I select DVI-D as the input. Usually the macbook's own display flickers a bit when the adapter is attached, but now it doesn't do anything at all, and OSX shows no additional displays detected.
I've tried NVRAM reset on my macbook, and all sorts of combinations of power-off/power-on/disconnect/connect/factory-reset.
I suspected the DVI cable, so I replaced it - but it did not resolve the issue.
I tried the adapter on another (older, 2008) macbook, and strangely this does detect the monitor and drive it, but OSX doesn't show any information from the monitor (such as model, suitable resolutions, etc) and instead just displays the desktop at 640x480 resolution. Trying to set the resolution to anything else doesn't work - there's no entries in the available resolution list. The display is stuck at 640x480, but at least it's displaying something. It's as if the EDID info isn't being sent down from the monitor, or may not even be there any more. I can set it to 1:1 mode and see the 640x480 desktop in the centre of the screen, or I can disable 1:1 and it auto-scales up to the full 24" display.
I tried an HDMI-MiniDisplayport adapter with an HDMI to DVI cable, and although this cable has worked fine in the past, it didn't work this time with my first macbook. Same behaviour as the other adapter (no signal), and same behaviour on the other mac too (stuck at 640x480).
So I think I've isolated the issue to the monitor itself, although I don't understand the difference in behaviour between the two Macs (maybe they handle corrupt or missing EDID info differently). At this point I'm looking for suggestions on what might have gone wrong. Also, is there a way to diagnose EDID issues on a mac?
I am able to use HDMI via a third-party HDMI-MiniDisplayport adapter, however the monitor only shows 1080 vertical resolution in this case, and looks a bit "off" (antialiasing doesn't work?). However for now it's all I've got.
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