Resolved pc restarts 1 sec after powering up

The system specs probably won't help in this case Neil, unless the problem is specific to that particular system. He (she) can't start the computer to get the SIW specs anyway. I agree that they could be helpful.

Most system specs can be gotten from the computer's manual (User Guide). Find the computer's manual on the internet if you don't have it.

Michel, you might need to "Clear the CMOS ", the instructions should be in the computer's (motherboard's) manual. If you are stuck, disconnect the power, take the CMOS battery out (the coin-shaped battery on the motherboard), press the Power-On button for 30 seconds or so. Leave the battery out for a few minutes (consider replacing that battery with a new one).

You are getting experience changing the thermal grease/compound (about 3 times if I read it correctly). Read the instructions carefully, more is not better. You only want to replace the air gap between the CPU and the heatsink with the thinnest possible layer of compound to displace any air. Air is a insulating medium and stops thermal transfer. The thermal compound is a better thermal transfer medium, but only just a better medium. You need the thinnest possible layer of compound (and no air pockets).

Putting on thermal compound is a technique. You probably won't get it right the first time. If the computer starts up, go into the BIOS and check temperatures if they are monitored.

Replacing the thermal compound IS the most difficult part of hardware troubleshooting (or using it to change the motherboard). The motherboard and CPU cannot be tested separately, the PSU, you can try borrowing another one to test. If you are lost, yes, take it to a technician. You might want to price a new CPU and motherboard first (unless it is OEM, like HP, Dell, Compaq, Gateway, Lenovo, etc, where you can't replace with anything but OEM parts).

Rebuilding yourself (say, new motherboard and CPU) is easy nowadays (a new CPU is pre-coated with thermal compound, Edit: wrong, the heatsink is pre-coated with thermal compound), it depends on other factors like the version of RAM (DDR, DRR2 or DDR3). OEM operating systems only work with their own hardware (you would need to purchase a new Windows disk).

If it seems "broken ", I would utilise any hardware I could and build a new one. You have done the hardest part of rebuilding a computer by getting experience replacing the thermal compound.

Matt

 

Matt, I looked at Michels first Post which was dated 25/2/2010. It was about this same problem. He said he had changed the thermal paste and CPU temp had gone down from 81°C to 25°C and the Post was marked resolved.

What has happened since???

We don't know if this comp is a brand name or home built. He doesn't have to use SIW to tell what components are in the comp as he should be able identify them as he has the case open. It may simply be a loose connection somewhere caused by all his probing around. Neil.

 

The quick restart makes me think it is basic hardware, the CPU (why I suggested clearing the CMOS), the RAM (although the system usually beeps or just stops) or maybe the graphics card is not seated squarely (yes, we don't know what sort of graphics adapter it has). I think the bare-bones startup has been suggested.

 

Michel, What is the Brand name and model of your computer? Neil.

 

thnx everyone I checked the processor and all the pins seems clean and alright so I placed it and started the pc but then a very strange happened, the pc did the same problem 3 times and then while I was unplugging the cpu it started but the monitor kept saying (no signal) so I unplugged it and rechecked the cables and started it again then it did the same problem going up for 1 sec and then going off and wait for a second then doing it again for several seconds and then it started again (it was like a dead battery car) but again there was no signal on the monitor and while pressing the caps lock or the num pad buttons their lamps didn't power on but the mouse's lamp was on , I really don't know what's wrong with it but it's starting to freak me

 

Michel, will you please answer Post #25 about your make and model of computer.

You just posted that you were unplugging the CPU. It reads that your system was "LIVE" (still powered on) Please tell me you were not working inside your computer with AC power still switched on!!! Neil.

 

no neil don't worry
the pc:
intel processor core 2 quad Q6600
intel motherboard
video card nvidia xfx 8600gt 1gb
1+1gb ram

 

Michel, you don't seem to understand. If you click on My System in the Profile box under Retiredlearner, the details of my computer will display.

For you to enable the same information, you click on "User CP" > Enter System Details where you put your FULL computer info. Then at the bottom of the page > Save.

If we know your Brand/Make of computer, we can get more info from their web site to enable more viable answers to your questions/problems. The setup is different for Models of the same Brand of computer.

Your info:intel processor core 2 quad Q6600
intel motherboard
video card nvidia xfx 8600gt 1gb
1+1gb ram
is not sufficient to enable thorough research. For example: what model Intel motherboard???

As was suggested in an earlier reply - Download SIW and install and this will give you all the information about your computer internals. Unfortunately, you can't do this at the moment because of your ongoing problem, but you should be able to see some detail on the components in your comp when you have the case open.

You haven't answered my question with regard to whether you were working on your computer when it was still "Powered up ". My reason for the question is that if you were pulling the CPU from the motherboard with power on, you might as well go straight to the Retail shop and purchase a new computer.

Please try and answer more fully our questions and take the time to fill in System Details. We are only trying to ascertain what your problem might be and help you to fix/repair same. Neil.

 

well when the pc do this problem the only way to shut it down is by cutting the power by removing the cpu's power cable from the electric connection but when the pc is working and there is no signal on the monitor I keep pushing the power button

 

Michel, If you want to Shut down the computer, push in and hold the start button for 5 seconds. This is normal procedure if you can't carry out normal screen shut down.
Pulling the power cable out of PSU socket may cause severe power surges which will damage internals.

Will you read my last Post and answer the question I asked as we are not going anywhere with your problem until you carry out the requests already made. Neil.

 

Dude i posted comp info in my profile.last night after cleaning the pc i tried to open it the pc worked ok for some minutes then i smelled smoke and there goes the power supply so i bought another one today and insurted it but yet the same problem

 

Michel, when you say the same problem after installing a new PSU, this is start for 1-2 seconds then shut down and restart and repeat? Neil.

 

hi neil, the pc did it just for one time only, but now it works perfectly thnx neil and every one

 

Nice one Michel. Thanks for letting us know your in business again. Cheers Neil.

It might pay to mark this as Resolved.