PC Screen not displaying

January 24, 2015 at 19:11:57
Specs: Windows Vista
Hi, After I change my CPU fan I am have the problem of no signal on my screen when I booth up my PC, I try taking out the Ram but still nothing, I reset the CMOS. So what can I do?

See More: PC Screen not displaying

Report •

#1
January 24, 2015 at 22:14:46
It's a desktop then? I assume it was working before you changed the fan?

Something happened while you were inside the case. Either you jostled something loose, didn't reassemble it correctly or damaged something, possibly with static.

When you replaced the fan did you also remove the heatsink? If so sometimes the heatsink is stuck pretty tight to the cpu and you may have pulled it out too. If so you need to verify the cpu is firmly in the socket with no bent pins and the heatsink and fan assembly is correctly latched down.

Make sure any add-on cards are firmly seated. Make sure all the power connections are tight.

When working on a computer it's always best to have the power cord disconnected. Not because you might get shocked but because most power supplies provide a small current to the motherboard even when the computer is off and that can sometimes damage things if you work on it under those conditions.


Report •

#2
January 25, 2015 at 08:49:14
If the problem started after you changed the CPU fan, why would you suspect the RAM or reset CMOS? More than likely you installed the new fan incorrectly. Please post the make/model of your CPU & the make/model of the fan you installed. If you didn't apply the thermal paste properly or didn't lock down the heatsink properly, it will prevent the system from booting.

Report •

#3
January 25, 2015 at 10:42:05
To clarify things, did you remove the heat sink and fan, or just the fan? Did you connect the new fan to the SAME header as the old fan?

Report •

Related Solutions

#4
January 25, 2015 at 11:56:35
Sometimes when cards get disturbed even slightly (including RAM) they move onto an oxidized edge connector area. Clean the edge connectors with a pencil eraser.

Also check all internal connections for firmness in case one was near to falling off.

Always pop back and let us know the outcome - thanks


Report •

#5
January 25, 2015 at 18:07:45
Yes I install both a new heat sink and fan and I done this to 2 of my desk top ad I am getting the same thing happening to both of them, that is when I turn on the power the CPU, fan and everything is running and seam normal but no response to the monitor to show anything but the first time after changing the heat sink and fan it came on with a black screen with some reading and at the bottom it read bad command I then press F2 and the screen went back with no response.
I did all my safety procedures example: remove the power cord then press the power button again to release the electricity in the system then tap the power supply to remove any static from my body.
The CPU lock down properly and the fan is install correctly they are working when I turn on my system s I do not think that is the problem so that is why I check an clean the RAM and place back into the slot correctly

Report •

#6
January 25, 2015 at 18:20:37
Did you use the approved method for applying the CPU-Heat-sink thermal compound on each computer? The methods can vary and are important. You should also clean off the existing thermal compound before fitting.

Always pop back and let us know the outcome - thanks


Report •

#7
January 25, 2015 at 19:10:48
Let me try again - please post the make/model of your CPU & the make/model of the CPU cooler so that we can point you to instructions to the proper thermal paste application. Generally there are 3 choices - middle dot, vertical line, or horizontal line - but it varies by make & model of the CPU.

See the following pics:

http://www.elitekiller.com/pics/AS5...

http://asetek.com/media/3995/therma...

message edited by riider


Report •

Ask Question