So, over the past few weeks my mother's laptop has presented me with a suit of problems relating to the display that so far I have not been able to nail down. It started with some mild flickering of the laptop's screen, flashing black for an instant a few times a minute. Over time it became more frequent. I have confirmed that this isn't simply a backlight going out as the image disappears entirely, rather than simply going extremely dim. Eventually the computer developed another unusual tic. While it was being used, the laptop would suddenly drop into sleep mode or hibernate (I believe, it was clearly asleep some times, at other times it needed a hard power-off before it could be woken up). On a hunch I modified the power settings so that closing the lid would 'do nothing', this seems to have worked on this symptom. About the same time as the unprovoked sleep states, perhaps a day or two later, another quirk developed. The laptop spends most of it's time as a pseudo-desktop with an external monitor connected via HDMI; occasionally, both monitors would go dark for several seconds. When I disabled the laptops integrated display in windows these seemed to stop, but at a slightly greater interval the external display would go dark and then the laptop screen would come back on along with the external. at some point in all of this, catalyst control center began to set the external monitor to 'overscan' by 15%, (which amounts to zooming out a bit, leaving a finger-thick black band between the bezel and the image). I am able to fix this setting in CCC, but sometimes, seemingly at random, the setting will come back. After a complete re-install of windows the problems had subsided a bit, but not enough to make the computer truly usable. I assumed the problem was at a hardware level and was only going to get worse, but after several attempts at re-installing drivers for the dedicated GPU we saw windows auto-install a driver that we had been unable to find on either dell's or AMD's site (the auto-installed one was from 2012, while the ones on dell/amd's pages were from 2009), and were pleasantly surprised to see the problems subside almost entirely. The integrated monitor still flickers, but at the same rate it was when this all began. Both monitors have gone dark, but maybe once an hour (vs. once every 5 minutes before). I had to re-set the overscan setting once after the driver was installed, but after that it has been fine. The laptop is a Dell studio 1749 with a 17" display and a AMD Radeon HD5xxx dedicated GPU, running windows 7 64-bit. It has been treated about as well as you can expect a laptop to be treated, spending most of it's life either on a table or on a lap-desk-thingy. I've check it's operating temps and they hover around 50-60*c IIRC, which seems high compared to my desktop, but not unreasonable for a laptop. I have a few thoughts about what may be causing the problems, but nothing seems to fit quite right. a flaky GPU could explain the occasions when both monitors go out, and the overscan settings reappearing, but it shouldn't cause flickering on one screen and not the other. Bad capacitors could explain the flickering of the laptop screen, but shouldn't have been affected by the recent driver update. If anyone has some thoughts on the matter, or suggestions of additional tests to run, I would love to hear them. I realize that this is likely a hardware problem and probably not easily fixed, but I still would like to get a firm understanding of the problem before giving up on it. If we can get the integrated display to remain off, I think the system should be stable enough as a desktop, and my mother will just use her tablet at bit more at meetings. Sorry for the lengthy post, but I only ask questions after I've done a fair bit of troubleshooting myself, and I know too little information is much worse than too much.