CPU Boots but No Display

May 14, 2012 at 07:39:46
Specs: Windows XP
I have a couple of years old PC running AMD phenom X3, 2GB RAM with a nvidia gfx card.

over the years it has had sustained some rough use like sudden shutdowns due to some problem with my UPS. never gave any trouble.

recently however after one such shutdown it completely froze up in the middle of some work. when I rebooted the CPU started as usual but the monitor didn't budge, its indicator continued blinking like it does when CPU is shut down.

after a few more attempts it suddenly came to life on its own, I ran a chkdsk and it worked normally after that.
then it happened again, and again, always after sudden shutdowns.

I ran chkdsk and then a registry cleaner. day before yesterday it had the same problem after yet another power shutdown.had a lucky break yesterday when monitor came to life, ran chkdsk and hoped for the best. worked once but today I have the same problem again, this time after a normal shutdown.

I must add that
a) have noticed a random noise that sounds like metallic friction which I think is coming from the hard drive.
b) my monitor is an old CRT one which had a trouble free life so far
c) I can access the wifi from my laptop after the no display boot up. not sure if it 'proves' that the CPU is alright or not.

my questions :
>> is there a way to check using my laptop if the monitor is ok ?
>> what are the general possibilities of the nature of my problem ?

thanks in advance.

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May 14, 2012 at 09:03:13
1) Yes you can check your monitor using a cable comes usually with a blue plug molded with two screws every left and right side.Attach one side in your laptop and another in your monitor and your laptop will supply a display to your monitor.

That cable looks like this http://zebcomcomputers.com/images/V...
It is called VGA cable.

2) Possibility 1
your monitor is having hardware problem due to the sudden power cuts

Possibility 2
Have you checked your CPU & GPU temperature at what temperature its working?
Some Mainboard completely power offs the processor if its at high temperature to save it from further damage.

your processor should be below 30 C when idle and less than 50 or 50 C at load.

CRT monitors displays blinking light due to no display or any hardware problem

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May 14, 2012 at 09:33:44
thanks for the prompt reply. unfortunately my toshiba c600's Fn key isn't working. so 1 can't be done.

how does one check temp ? given that it didn't work even after I left it off for hours could it still mean a temp related problem ?

also, does the fact that wifi is working (d-link modem connected to cpu) mean that cpu is working properly ?

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May 14, 2012 at 20:19:27
We can't say your CPU is perfectly healthy until you provide temperature readings & if you want to check the temperature download CPUID H/W Monitor http://www.cpuid.com/softwares/hwmo... we can't say the temperature its showing is accurate because no third party software shows accurate temperature so i prefer you borrow someones keyboard for a while.

Your wifi is connected to mainboard not to CPU,actually that isn't a cpu what you are calling it a cpu its a cabinate.
A CPU is a small chip installed on your mainboard,generally most mainboard have cpu location at upper left side,

Did you checked you Monitor with the VGA cable?
99% Problem is with you monitor i think check it and report back.

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Related Solutions

May 14, 2012 at 20:30:59
thanks. to check the monitor I need to be able to use the Fn key of my toshiba laptop. will do when I find the driver CD for it.

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May 14, 2012 at 21:48:17
Another Solution is to take your whole CPU to your friends home to confirm that your CPU isn't having problem.

If your CPU is Fine that you are going to change your CRT.

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May 27, 2012 at 03:18:53
update, my monitor is fine, the problem seems to be with the gfx card.

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