My n900 has been working so good for over a 18 months now that I have not changed,moded,updated or added any software to it. It just does the job and I have no complaints.

However, just recently it has begun to chew up the battery something wicked. I mean a full nights charge and then I get 3hrs use. So I thought the battery was faulty. I purchased a new one (Genuine) and I get about 2 hours more usage than the old battery. But before it chewed up battery my n900 would last all day from 8:00am to midnight without recharging now with the new battery I only get 5hrs max.

So I did a bit of checking, and I noticed that the backlight does not switch off automatically now. I have to manually slide the side slider button. The backlight timer is set for 30 seconds but it does not work. I think the problem is that my phone gets accidentally touched and the backlight comes on and then never goes out until the battery is chewed up.

As I said, I have not changed anything. How can I get the backlight timer to work again?