backlight cutting out irregularly on MacBook
so i recently cleaned the fan out on my macbook and replaced the thermal paste (wooo did it need it) and its been running like a dream until a week or so after i did the repair.
the backlight didnt turn on after sleep. i can see desktop just about and if i flick the f1 f2 keys it will light up for a split second and then go off. sometimes turning on and off works or setting it to sleep and reopening.
i know that it could be either the cable or the component for the backlight but strangely when it works it works perfectly with no issues at all ... until its shut down or sent to sleep.
ive tested it with an external monitor and it works fine.
basically i just need some advice on the best coarse of actions. wheres best to get parts etc.
Is this a good question?