No input to display after booting computer after a long time.

sunu0000

Honorable
Aug 8, 2013
2
0
10,510
Hi guys!

I started my desktop computer today after like 2-3 months. And the display is not getting any input signal.

I checked the connection and all. The CPU fan etc are also working. I don't have a discrete graphics card. I am wondering what the problem is? The computer is fairly old (5 years) and I didn't use it at all for the last 2-3 months. So is it the CMOS battery that has run out? Or is it something else? I need some help figuring that out.

Thanks.
 
Solution
If your mobo has a piezo-speaker on it, you'd hear a normal POST beep, followed by the HDD activity LED flickering as it loads the OS.
If you don't have a piezo-speaker for your mobo, get one, as POST may be failing with errors.
Try removing and reseating your RAM and power cables.
If the CMOS battery died, you should still be able to get to a BIOS screen, even if the PC has "forgotten" what drives are installed, or the boot order. After five years, replacing it is probably not a bad idea. Most likely, it's a pretty commonly available type like a CR-3032 or CR2032.

Something may have loosened (or corroded). Recheck your monitor cable and its connections.
Does the PC sound like it is booting, or does it just sit there with fans running?
If the latter, go over the mobo carefully looking for swollen or leaking capacitors. Google "bad capacitors" for images of what they look like.
 

sunu0000

Honorable
Aug 8, 2013
2
0
10,510


I'm not really sure how to know if the pc is really booting or it's just the fans running. But I just checked all the capacitors. They seem to be in a perfectly good condition.
 
If your mobo has a piezo-speaker on it, you'd hear a normal POST beep, followed by the HDD activity LED flickering as it loads the OS.
If you don't have a piezo-speaker for your mobo, get one, as POST may be failing with errors.
Try removing and reseating your RAM and power cables.
If the CMOS battery died, you should still be able to get to a BIOS screen, even if the PC has "forgotten" what drives are installed, or the boot order. After five years, replacing it is probably not a bad idea. Most likely, it's a pretty commonly available type like a CR-3032 or CR2032.

 
Solution