Dv6910us shuts off within seconds-minutes

Hello. I have owned my Pavilion dv6910us for a year and a half. This evening, I sprayed some compressed air into the vents to dislodge some dust from the fans. I did this before about a year ago when my fans began to run loudly. Please note that the computer was turned off and unplugged when I did this
When I started the computer again, it booted up and I got to open my Firefox browser before the computer shut off without warning. Now I can't get the computer up to the vista startup screen. It usually gets to the screen where it tells me that my computer was not properly shut down before turning off.
I noticed that the fan that usually starts when I boot up no longer turns on. I can hear the hard drive booting up, however. The computer remains cool and everything. I'm pretty sure I did something when I sprayed the compressed air into the vents. What can I do to remedy this?
I will also mention. that I installed some vista updates right before I shut the computer down to spray it. I'm not sure if this is an issue. I was also having problems with the computer intermittently going from AC to battery power even though the computer remained plugged in.
I'll appreciate any help. Thanks.

UPDATE: The computer stays on now, but the fan isn't working at all. I used HWMonitor and the temperatues were around 80 degrees celsius. I'm sure that's not a good temperature.

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Dv6910us shuts off within seconds-minutes

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