Try the usual new CMOS battery then call it dead.
Bob
The model is NV52, windows vista. I had it for about 5years now. When i power it up, i hear the fan but the screen doesn't respond. There have been a few occasions that the screen would come up, but on stormy nights, i would power it down, then i have the problem again. Also when I have to do updates through Norton, it will do a restart, except it never comes back. Any advice besides getting a new computer of taking it to a technician. Of course the warranty is out, so not an option. I want to use all possible diy solutions before i go the monetary route!
Thank you in advance.

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