03-18-2017 07:19 PM
So I was cleaning my pc today, and I opened the heat sink, and Cpu. Then I put them back and plugged in my video cable and turned the pc on when the monitor refused to turn on. I did some research and I put back the heat sink, took out the ram, and took out cmos battery for about 5-10 minutes. When I put everything back, I turned it on and everything worked, but the monitor is blue instead of being all colors, (also the time and date werent set when I turned on the computer), Can anyone please help!
03-18-2017 07:39 PM
> ... put back the heat sink,
Did you clean off the old "heat-paste" between the bottom of the heat-sink and the top of the CPU, and apply fresh paste? That paste is meant to make a good "seal" between the two pieces, and to transmit heat from the CPU to the heat-sink.
> took out the RAM , and took out CMOS battery for about 5-10 minutes.
> (also the time and date were not set when I turned on the computer),
Without the battery, the date/time will "default" to some value.
Also, all of the other BIOS settings will be set to their "default" value.
> When I put everything back, I turned it on and everything worked, but the monitor is blue instead of being all colors,
Colours on the screen are "additive". For example, mix all 3 primary colours to get "white".
If you get "purple" instead of "white", you are mixing only 2 of the 3 primary colours.
Check the video-cable's connections, at both ends, to be sure that the monitor is receiving all 3 colours.
However, if the screen is 100% "blue", that could be the default colour for your monitor, when it is *NOT* receiving *ANY*signal from the video-circuits on the motherboard. Ouch!
When you reboot your computer, can you enter BIOS SETUP, and see enough to update the date/time?
If you cannot enter BIOS SETUP, you may have "killed" the motherboard, possibly by pushing on it with enough force, while reconnecting the heat-sink, to "flex" the motherboard, to break some of the connections. Double ouch!
03-19-2017 01:27 PM
I did not apply new thermal paste but the paste did really look dry. And I did not yet mess with the monitors colours, and also how do I do that exactly? Also how do I go in to BIOS setup, What should I choose?
03-19-2017 01:38 PM
> I did not apply new thermal paste but the heat-paste did really look dry.
It's "best practises" to remove the old paste, and apply new one, because you want a good, even, layer to avoid "hot-spots" as the heat transfers from the top of the CPU to the heat-sink.
> And I did not yet mess with the monitor's colours, and also how do I do that exactly?
Check that the "video" cable is tightly-connected into the monitor, and tightly-connected to the socket on the computer. The three primary colours are transmitted through different wires inside that cable.
Also, can you temporarily connect the monitor to a different desktop or laptop computer, to see if it shows the proper colours?
> Also how do I go in to BIOS setup, What should I choose?
Turn the computer off.
Turn the computer on, and keep tapping the 'F2' key, until you see a message about "press <blah> to enter BIOS SETUP".
03-19-2017 02:29 PM
> I think its just the colors because when I go to the monitor menu I can see white, black, and yellow.
We need to verify that all 3 "primary" colours being generated by both computers are reaching the monitor.
This is different from the colours being generated "internally" by the monitor.
It could the video-cable that is the problem -- not transmitting all 3 colours. Try a different cable.
03-21-2017 03:43 PM
Its not the cable, I connected the cable to my laptop and it seemed to work fine with the monitor, It showed all three primary colors. But when I switched back to my desktop, it turned back to blue.