Hill Wimp
Fair weathered,fair minded but easily persuaded.
I will try that thanks . I removed all the screws on the back but it just would not come off.Have you tried a search on YouTube? There are loads of strip-down vids, and sometimes it's amazingly easy to access the fan. On my old HP 6120, eg, it's a matter of removing two screws on the bottom, using a basic cross-head screwdriver, then releasing four clips on top of the keyboard, using a basic fingernail, then the keyboard just lifts out and there's the fan. Cleared out a pad of dust on mine recently in about five minutes from start to finish.