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Computer won't start properly (Resolved)


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#1
Kelly d W

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My Computer. HP Pavilon 1125C was running fine. I removed the side cover to clean it. It was shut down. I removed the Processor Fan and cooling block. Blew it out with compressed air. Replaced it in same position as removed. Used can of "clean safe dust remover" and blew out the inside of the computer. Was not real bad. When I started the computer all I get on the screan is many horizontal lines of various colors. No wording at all. I can see something is moving as colors and bars flicker and change occasionally. Did I mess up the Processor? I did take it apart again and found a heavy dust buildup on the processor surtace and on the fan block surface. It was kinda packed dust? Didn't recognize it on first cleaning. Required paper towel to wipe it off both surfaces. Still won't start up properly. Wondering if it got hot as the packed dust might have caused the cooling block to be too far away from the processor when I started it???


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#2
Alzeimer

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Hi and welcome,

 

Couple of things you should check

 

1- Are you using the integrated video or do you have ab addon video card in your pci-express slot. If you fgot an addon card make sure it is well seated and that any extra power requirement is plugged in.

 

2- When you say you took out the heatsink on your processor to clean it did you make sure to clean the old thermal paste and put a new coat on your cpu.

3- Sometimes colored lines like you are experiencing are caused by a faulty video cable (make sure it is properly attached)

4- When blowing air in a computer always make sure that all your wires are properly attached to your computer.

5- take out your ram modules and make sure no dust are in your dimm slot and put them back properly.

 

 

 

Hope that helps


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#3
Kelly d W

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I am using the original video componets. I took the finned cooling block outside to blow it out. The only air in the computer was the canned air for computers. I did not clean the old thermal base or add no coat on the cpu. After I had the issue I removed it again and cleaned the thermal base and the outside of the processor but did not use a coat on the cpu. Didn't know about that and don't know what to use. restart is the same and that is why I thought I overheated the processor.


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#4
phillpower2

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Hello Kelly d W

 

As Alzeimer is offline I will chime in and hopefully help avoid the CPU being fried  :alarm:

 

Do not turn on the computer again until the heatsink and the top of the processor have been correctly cleaned off and a fresh amount of thermal paste has been applied, a guide to help with this here

 

For future reference, it is not usually required to remove the HS to clean it and this way the original thermal paste will normally last the lifetime of the computer.


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#5
Kelly d W

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What is thermo paste? since I cleaned it all off and reinstalled without the paste could that be what is causing this issue?


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#6
Kelly d W

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Oh yeah.... and how can I tell if I've already fried the processer.?


Edited by Kelly d W, 17 September 2014 - 04:05 PM.

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#7
phillpower2

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What is thermo paste? since I cleaned it all off and reinstalled without the paste could that be what is causing this issue?

 
What is CPU Thermal Paste Used for?

What is CPU thermal grease used for? It is applied between the contact surfaces of the CPU and heat sink (or water block if you have water cooling) to improve heat dissipation and lower the CPU temperature.

Applying thermal compound is a must because the contact surfaces are not perfectly even and smooth - Even brand new CPUs and heat sinks have surface imperfections and microscopic scratches that traps pockets of air. Since air is one of the worst thermal conductors on Earth, it will impede the heat sink's ability to lower the CPU temperature.

Without the humble thermal paste, CPUs will run about 20 to 30°C hotter when operating under load.

Thermal paste fills up the microscopic air pockets between the contact surfaces to allow for better heat dissipation. We must stress that CPU thermal paste is used for filling air pockets and NOT to create a separate layer between the two surfaces

 

 

 

Not having cleaned correctly and then reapplied a fresh amount of thermal paste will be causing the issue.

 

Oh yeah.... and how can I tell if I've already fried the processer.?

 

 

If the CPU was already fried the computer would not show anything at all on the screen.


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#8
Kelly d W

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Thank You a lot. I will see if I can get some thermal grease tomorrow and will see if all is well once again.


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#9
phillpower2

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You are most welcome Kelly d W  :)

 

Any further questions please ask, if not let us know how things go  :thumbsup:


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#10
Kelly d W

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I put the greese on and restarted computer. Same results. I unplugged one of my ethernet boards and installed a video board and hooked the monitor to that. Started computer and the monitor showed nothing at all. I removed the video board and put the original ethernet board back in place. There isn't anything attatched to it tho. Restarted computer again and it actually started and loaded. Don't know what happened exactly but I know if I had not put the greese on it I would have had problems soon. Thank You all for all the time and help...


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#11
phillpower2

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Most peculiar but if you are up and running that is great, well done to you btw  :thumbsup:


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