I would strongly advise against lubricating the fan. I personally feel that you should only lubricate the fan as a last resort and only if its necessary. I wouldn't bring WD40 anywhere close to that fan (only if you like to experiment and probably end up ruining it). I don't know who recommended that, but I suggest you do more research. I've done this mod with TX-2 Tuniq thermal paste and I'm getting ~68C GPU and ~49 CPU, plus or minus 4 or 5 degrees. Everybody who does this mod should get these type of numbers. Big improvement from 93C GPU temperature I was getting before. For video problems, maybe try getting a new motherboard. Its 400 dollars directly from HP, but if you try eBay you might find one for ~140. Most of the sellers from eBay are located in China, so choose your seller carefully because in case the product is death on arrival, return shipping to China from the US is expensive and at least 20+ $. I was lucky and found one brand new re-certified by HP motherboard for 150. I used a .66mm copper shim and removed black paint from only the outer edges of the fins to achieve this result. *Although this mod doesn't fix the heating problem entirely. It makes the laptop usable for light use (checking email, web browsing, etc). Don't use this laptop for anything cpu intensive.