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Re: fan not running
It depends on make of laptop. my toshiba's fan "NEVER" came on, yet it is going on 14 years old and works perfectly. I have another toshiba where the fan cycles on and off on its own. to be sure you are not overheating it, purchase one of those cooling trays (or prop it up on a hard surface for maximum exposure to ambient air) just for peace of mind.
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Sounds like it's overheating, if it comes on for a few seconds or even minutes. Turn it upside down, and clean up the cooling fan with a nice dry paintbrush. You may need to remove a back cover to get to the fan though.
it seems that you have damage memory card replacing may fix a problem but its better for it that you bring it to a technician in order to check much better because the motehrboard may possible be the problem.
If there is no fans spinning or nothing, check the adapter to see if it has malfunctioned.
It is possible that the transformer that converts the voltage from what the adapter puts out, to what the laptop uses, doesn't work at all. This piece is supposed to regulate the proper voltage to the laptop.
You have all the simpthoms of an overheating laptop.
For starters, get a vacuum and **** all the dirt from the fan or fans on the back/ bottom of your laptop.
Then turn on your laptop. It should stay longer than 5 seconds.
If this solves your problem, then you are lucky.
If not, you'll need to have your laptop serviced, and clean the heat sink, and have reapplied the heat transfer compund on the processor.
Not a big deal, and not that expensive either.
If this answer helps, please don't forget to rate.
it sounds possibly that it is going into hibernation. a single press of the power button should bring it back alive.
also feel the bottom of the laptop.... if it is getting close to meltdown you need to clean the dust and dirt from the heatsinks. the fan area may appear to be clear but all the junk gets blown against copper heat sinks so you need to remove the covers to get at it.