apparently laptop graphics cards commonly fail and develop breaks in the solder contacts from overheating and poor manufacturing-so one trick is to re flow the solder by baking the card for a short time in an oven-remove the graphics card carefully .make some standoffs /i used paperclips to elevate the card an inch off the cookie sheet.put into an over for 10 minutes at 400 degrees-remove and reinstall.holly crap -the shit works-i finally did it the other day with my Acer laptop and it is reborn-amazing.
i could tell the solder joints looked shinier so i know it made some difference before i reinstalled the card,rebooted and its runs perfect .
gl
this is for removable cards only!