I'm having a problem that suddenly appeared for no known reason (laptop was not dropped, no lightning storms or ac power surges-laptop
was just sitting on a table and had been working fine for years): on startup, a message appears that says "fan error" and the machine shuts
itself off in about 10 seconds, long before trying to boot Windows.
When the fan comes on, it pulsates-seems to be under power for about 1 second, then no power for about 1 second where it constantly
slows down, then powered on again for about another second where it speeds up, etc, ad infinitum.
I replaced the fan with a new one and the situation remained unchanged. I researched the fan and it appeared the one to get was 42W2462
which is what I got.
If I hit "escape", I can get around the "fan error" message and boot and run windows. Most of the time, the fan continues to pulsate, but
sometimes it runs constantly for stretches of around 10 or 15 seconds or so and then resumes the pulsating.
As a test, I ran the machine this way and it stayed on and worked fine for over 45 minutes, so I do not believe it is overheating. As a previous test, I ran the machine with no fan but with the fan heatsink still attached to see if the heatsink would carry away enough heat by itself. I did this twice and after about 3 to 5 minutes, the machine shut itself off which tells me the machine shuts down when it gets too hot.
I take that to mean that when I run the machine as it now is, where I get around "fan error" with "escape", that the machine must be getting cooled ok since the machine does not shut itself off.
If all of this is right, then the only problem I have is that I have to hit "escape" every time I startup and I have to hear a pulsating fan noise. I'd rather live with that than get another motherboard.
Nowhere in bios setup could I find any type of setting for the fan or even a display of the fan speed or any internal temperatures. My bios is version 2.26 (7LETC6WW).
I currently have a T61 type 7664-16U. It has the T7300 cpu (dual core 2.0GHz), nvidia NVS 140M graphics, 14.1" widescreen 1440x900.
Are there any programs for the T61 that run under Windows or are there any fairly easy "tricks" so that I could just set the fan speed to maximum or maybe to some percentage of maximum that I could select? I haven't been able to find any programs yet. The one I found with Google all seem to be for models other than the T61 or for Linux which I do not run. I'm running Windows 7 on this laptop.
Do you agree that since I put a new fan in and still have the problem, that the problem is the motherboard?
Thank you very much!!!