Helping people with computers... one answer at a time.
Diagnosing a machine remotely with very little information is impossible. It might be time for a local technician.
My Windows XP occasionally does not boot up. I power on/off and sometimes it boots.
In this excerpt from Answercast #24, I run through a list of things that might be causing a machine to not boot reliably. Unfortunately, that won't be much help.
I hear this kind of scenario fairly often and unfortunately, it's not nearly enough information for me to make even an educated guess as to what could possibly be going on. It's also extremely difficult to diagnose remotely: so I typically end up suggesting to people that they find a technician to help them through.
The problem is that this could almost literally be anything:
It could be a hardware problem.
It could be hardware that doesn't work until it's warm enough.
It could be hardware that's only connecting sometimes.
It could be RAM that's flaky.
It could be software that gets loaded into one place on one boot up and a different place on another boot up.
It could be a software issue.
It could be a software timing issue.
It could be out-of-date drivers.
It could be malware.
It could be any number of things.
So the only suggestion I can make for these kinds of questions (for a
scenario where you have to turn the machine on two, four, eight times before it
will actually come up and stay up) is to find yourself a technician. A
technician who can diagnose the machine, look at it hands-on, and see what may
or may not be going on.
Next from Answercast 24 – My hard drive is overheating, how should I fix it?
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