From what little I can find on MR forums which is topical, I may be facing either a failing display or possibly the GPU.
I’m on the fence here because it has appeared thrice over the past day (for the first time ever), and it seems to come up when I’m not actively using the laptop. As I type, it isn’t present.
In short, it’s a single horizontal line of dropped signal/stationary noise (i.e., a single line which has lost its signal and is displaying a relatively brighter illumination). This being the high-res DLSD dual-link display, it’s noteworthy how the horizontal line happens to appear exactly along the middle (approximately the 525th line on the 1050px vertical, or if like a world map, where the equator would be).
I opened the case to re-seat the LVDS cable, and this made no difference… until several minutes after I began to actively use the system and everything warmed again. Over the last few days, I have had the fans running full speed when idle (G4fanControl) to work some graphite lubrication into the fans’ spindles, which lets the CPU idle at a very cool 38–39°C. I doubt, however, this extent of coolness would affect the GPU.
So I’m curious: have any of you with the A1139 or any of pre-A1261 17-inch CCFL MacBook Pros ever witnessed the failing of a display which was not a faulting of the GPU — namely, in which a single horizontal line was failing?
I’m on the fence here because it has appeared thrice over the past day (for the first time ever), and it seems to come up when I’m not actively using the laptop. As I type, it isn’t present.
In short, it’s a single horizontal line of dropped signal/stationary noise (i.e., a single line which has lost its signal and is displaying a relatively brighter illumination). This being the high-res DLSD dual-link display, it’s noteworthy how the horizontal line happens to appear exactly along the middle (approximately the 525th line on the 1050px vertical, or if like a world map, where the equator would be).
I opened the case to re-seat the LVDS cable, and this made no difference… until several minutes after I began to actively use the system and everything warmed again. Over the last few days, I have had the fans running full speed when idle (G4fanControl) to work some graphite lubrication into the fans’ spindles, which lets the CPU idle at a very cool 38–39°C. I doubt, however, this extent of coolness would affect the GPU.
So I’m curious: have any of you with the A1139 or any of pre-A1261 17-inch CCFL MacBook Pros ever witnessed the failing of a display which was not a faulting of the GPU — namely, in which a single horizontal line was failing?
