All the fans are active but the monitor gets no signal

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alex44412

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Sep 17, 2019
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Hi,

I have had trouble with my pc last couple of weeks sometimes it just crashes and displays lines on the whole screen and sometimes it just goes black.
Recently the pc starts but the monitor gets no signal.

What i have tried so far:
* change cmos battery
* Replug all cables
* Different pci slots for gpu
* Different monitors
* New thermal paste on cpu
* Cleaning the pc
* Installing new drivers (when it worked)

It struck me the thought that the gpu might be defect but i'm not sure it also might be something else.

GPU: Asus Radeon R9 280
Motherboard: Don't remember specifically but it is a asus motherboard
 

alex44412

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Sep 17, 2019
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Can't download that nothing displays on the monitor can't see anything.
Also the motherboard is MSI 970 gaming motherboard
 

gus

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Does the pc have graphics port on the motherboard? If so REMOVE (take it out of the pc) your GPU and plug a known good cable into the motherboard graphics port to the known good monitor. Seeing you cant see anything on your screen REMOVE your motherboard battery for 10 minutes, then refit it. Reboot and see what happens.
 

alex44412

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Sep 17, 2019
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The motherboard does not have a graphics port and also tried removing battery for 10 min same problem all fans turns on but no signal to monitor. The cables are good i just recently bought three new hdmi/vga/mdp cables none of them worked.
 

gus

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If you have no graphics port on the motherboard, and you have tried your existing graphics card with a known good cable and monitor, then can you beg borrow or steal another graphics card to test with?
 

alex44412

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Sep 17, 2019
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All the hardware is around 7 years old the power supply is Fractal design 550w but that should not be the issue because it worked perfectly before. I will try to borrow a graphics card and see if the gpu is the problem.
 

phillpower2

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Sep 9, 2016
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All the hardware is around 7 years old the power supply is Fractal design 550w but that should not be the issue because it worked perfectly before.
As a PSU puts out various voltages +3.3V, +5V and +12V it may appear that the PSU is working correctly but it is not, any significant drop of any output can prevent the system from booting up, the other scenario is a significant increase in the output which can be worse as it can fry one or more major components such as the MB, CPU, RAM, add on video card etc.

A seven year old PSU having problems would be no surprise as it has been powering all of your hardware all that time, seven years old also puts it four years out of warranty and I would have replaced it well before now in any event.
 
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