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Lifebook A CPU problems

post #1 of 20
1/19/10 at 3:09pm
Thread Starter 
Computer starts normally and runs normal initially. Then, the CPU just shuts down to 0% performance. Computer stays on, screen is normal, cursor moves, but does not do anything.

At that point, it will not even shut off normally. Only way out is to manually shut off the power.

My initial thoughts are that the cooling fan, but it sounds like it's running. Would overheating shut down the CPU, yet leave the screen normal ,and allow movement of the cursor?
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post #2 of 20
1/19/10 at 3:39pm
No if CPU shuts down I would think all would fail? Just for kicks run in safe mode does the same thing happen? Even in normal mode what are CPU temps? I am leaning away from hardware at this point that is why I am asking you to do and what temps are? It is very unusual behavior. Oh are you getting great HDD usage when this happens (hardware) that is the only thing even close I have ever experienced, but that is only temporary.
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post #3 of 20
1/19/10 at 4:39pm
Thread Starter 
OK, just had it sitting while idling and the task manager % showed 7% when it stopped. Cursor would move, but not exit browser window, BUT, it did exit task manager. It would not reopen task manager or anything else. At this point, if you try to use the cursor multiple times, the computer will start emitting a loud tone, continuously, and then, the only way to stop it is to do a manual shutdown. BTW, still hear the fan running.
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post #4 of 20
1/19/10 at 7:11pm
Time to perform a good clean up inside your comp, a chkdsk and a good defrag for start. Make sure that you have plenty of disk space as well.

cheers ...
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post #5 of 20
1/21/10 at 11:27am
Thread Starter 
I'm back !! OK, took laptop apart and cleaned out numerous dust bunnies. Actually, not real bad, but IMO, bad enough to possibly cause a heat problem. Defragged the drive, and initially, the computer seemed to run better. It stayed up and running for close to 2 hours before stopping again.
At this point, I can click the tabs on task manager, and they work, however, it literally shows 0% on all CPU functions.

Closed task manager, and that worked. Reopened by using cntl, alt, del, and it reopened. Was going to try a shutdown/restart, but it froze again, requiring a manual power off.

On immediate startup, it works fine again.

Help !!!
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post #6 of 20
1/21/10 at 12:26pm
I would try next a CHKDSK, just to be sure that there is no bad sector lurking about. And reseat the memory, or take one out if you have 2 (swap them around also)

cheers ...
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post #7 of 20
1/21/10 at 3:53pm
Thread Starter 
Ran the checkdisk and then pulled the memory, and reinstalled in the opposite seat.
Same problem. Task manager will sorta operate, but anything else does not. It's almost like it's running at 1/2% or less, but still showing zero.
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post #8 of 20
1/21/10 at 4:13pm
You only have one stick of ram?

cheers ...
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post #9 of 20
1/21/10 at 4:17pm
Thread Starter 
No, switched the two sticks to the opposite seat. Sorry for the confusion.
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post #10 of 20
1/21/10 at 4:24pm
Leave one out, run with just one at a time.

cheers ...
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post #11 of 20
1/22/10 at 1:40am
Thread Starter 
OK, took out one, tried it and after a while, the laptop stopped. So, I took it out, installed the other RAM and it lasted longer, but did the same thing.

Now what?
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post #12 of 20
1/22/10 at 6:51am
At least we know that RAM is fine.

Can we try leaving out the battery and run the comp only on AC Adapter?

cheers ...
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post #13 of 20
1/22/10 at 5:48pm
Thread Starter 
Battery out and the same thing....

Next?
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post #14 of 20
1/22/10 at 6:57pm
Start it up and run it in safe mode. Let's see how long this one last.

cheers ...
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post #15 of 20
1/24/10 at 5:03am
Thread Starter 
Got is running in safe mode, and it is still running, very slowly at times, but running.
It appears that the CPU is running, but very slow. Very, very slow.

Can a CPU go into a slow mode?
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post #16 of 20
1/24/10 at 8:16am
Yes, it is being throttled down.

Time to perform a clean install, and if you can pop in a faster new hard drive. There is no need to waste time just playing around with drivers update.

cheers ...
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post #17 of 20
1/24/10 at 1:13pm
Thread Starter 
Update, it's still running, but slowly...
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post #18 of 20
1/24/10 at 5:41pm
On a new drive, new installation? or you are still under Safe Mode?

cheers ...
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post #19 of 20
1/24/10 at 6:24pm
Thread Starter 
No, new drive, same setup, just letting it run to see if it stops, so far, not yet....

Don't have a new drive available yet.....Still can't figure out why the CPU would throttle down.....
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post #20 of 20
1/24/10 at 6:47pm
You are running in Safe Mode. Many drivers are being deactivated. I would not worry about it. I am definitively sold on a new drive in your case.

cheers ...
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