This is a common/known issue. There was actually a class-action lawsuit about these sort of issues, but the window of opportunity for your claim ended in March? I believe.
Here is one way to fix it, though it's rather extreme -
Link. It's actually being done to a DV2000 that was having the identical issue you're detailing.
Basically, you bake your chip back to life, either in an oven, or with a heat gun. The heat gun method is probably preferred.