CPU fan running but no display no sound

hello friends,i got a problem
my cpu fan is running but no display on monitor.I also removed cmos & ram for 2 minutes and inserted back.after that,my cpu automatically turn on when the ups is on.....I have also check motherboard by removing ram( i heard a beep voice) I have got this problem after a lightining .please tell me a solution for this.....

Hi,

My CPU makes long beep sound continuously and my monitor is not turning on. The error message says, "no display". It is sure that monitor has no problem but CPU has something wrong.

Please help me!

Hi,

Yesterday, my monitor worked fine. Today, l connected it to a different computer just as a test to diagnose the monitor problem on that computer. This monitor again functioned properly on the second computer. Then, l brought it back to the original computer and reconnected, found everything as normal.

When l turn the computer on, the monitor shows the brand name screen and then goes to a black screen with the "no signal" message.

I know the computer is functioning because l can hear the welcome sound even though nothing shows on the screen.

I have tried unplugging/re-plugging and removing/replacing the CMOS battery. No succe...

Hello everyone. Im new to this forum so I hope you can help me with my problem. Today I was playing some warthunder when suddenly my pc just turned off. I tried to turn it on after and it wont boot. The fans were spinning loud but everything else just seems fine. Here are my specs:

Motherboard: Biostar G31-M7 TE
Cpu: Intel Core 2 Quad q6600
Gpu: Geforce GTX 260
PSU: Cooler Master Silent Pro 1000w
Hard Drive WD 160gb

From what I have read I think the problem is because of the motherboard. I think it has reached the end of its life. I have had his system more than 3 years. If you could help me I will be thankful. Sorry for he bad englis...

my pc displayed the message 'CMOS battery failure detected, press Enter to continue' for a few days, but it still worked. then yesterday suddenly it had no display on startup and beeped 3 times. i did a power supply reset and it turned on. but today it happened again and the reset doesn't work. what am i to do now?
thanks in advance.

dipankarbaishya - Jul 10, 2013 at 12:47 AM
SAS - Mar 21, 2017 at 07:15 AM

Hello,

I have been facing a problem with my computer for the last few days. It used to run normally until a today when I see "no signal" message on the monitor, right after switching it on. The CPU fan is working fine, the video card fan is also working fine, the casing's fan is also working fine. The monitor's LED just lit in blue color then after a few seconds, it turned to orange.

Meanwhile, the display is showing "no signal". I don't know what has happened or what could be the problem. I tried swapping the memory card with my new one, but there is still no success.

I also unplugged the keyboard, mouse, and hard-disk but still display says "n...