Hard to diagnose issue

CDN_Merlin · Post by **CDN_Merlin** » Mon Jun 10, 2013 4:15 pm

P8P67-LE ASUS.
I7-2600K
GIgabyte 5830 Video.

This has been happening since I bought this PC upgrade over a year ago. When I reboot/boot, it goes through the post, then shows the windows logo and then my monitor goes to sleep with "no signal" on it. The PC is still booting except the monitor isn't showing anything.

I reboot and try again. Normally after a few tries it boots into windows. My monitor is good and I figure that the MB is good but I don't have any spare parts to check if it's the video card without buying one and seeing but I really don' t have the spare cash. Unless I know for sure it's the video card or MB, I can't afford to replace them.

Anyone have a general idea? There are no beeps, like I said the system sounds like it's still booting in the background but somehow either the video or MB is not sending the signal to my monitor.

Any help appreciated.

Foil · Post by **Foil** » Mon Jun 10, 2013 4:25 pm

Try plugging the monitor into the other monitor output.

I've seen something like this before, when the drivers were seeing the output I had plugged in as the secondary display.

CDN_Merlin · Post by **CDN_Merlin** » Mon Jun 10, 2013 4:26 pm

Next time it happens I'll try that. It's currently plugged via a vga/dvi connector as my monitors DVI died a while ago.

Krom · Post by **Krom** » Mon Jun 10, 2013 4:51 pm

If only you had gotten an Asus P8Z68 variant mobo, then you would have the onboard video to test with. It doesn't sound like the monitor because it is there enough to see "no signal", but it doesn't mean the monitor isn't the cause anyway since you mentioned the DVI died on it.

Basically diagnosing something like this requires spare / surplus parts, to really rule everything out you probably need another video card and another monitor (and I'd try the monitor first just because it is easier to swap). Is there anyone you could borrow a monitor from (and possibly a video card too)? Or perhaps even take your monitor and try it on a friends computer, including the DVI connection to be sure it is the one on the monitor that is dead and not the one on the video card.

CDN_Merlin · Post by **CDN_Merlin** » Mon Jun 10, 2013 5:24 pm

I can bring it to my dads to try his monitor. no one I know has a spare video card

Krom · Post by **Krom** » Mon Jun 10, 2013 5:44 pm

Nobody has a spare in the sense that they don't have one just sitting around, or nobody else you know has a dedicated video card at all (even one that is currently in a PC)?

Too bad you don't live near me, I have 3 extra video cards just sitting around in my room.

CDN_Merlin · Post by **CDN_Merlin** » Mon Jun 10, 2013 7:43 pm

All my buddies who I used to lan with have moved away. Only my dad is around but his PC is a dell.

BUBBALOU · Post by **BUBBALOU** » Tue Jun 11, 2013 6:26 am

Sounds like a monitor issue with bad caps....

Without a reboot, power off monitor unplug wait 5 plug back in turn on to regain video(early stages of caps failure)

Without reboot, Pull monitor video cable and plug back in to regain video (mid stages of cap failure)

Monitor goes to sleep when switching to game mode, higher refresh or locked aspect mode- video driver chip cap is Toast

CDN_Merlin · Post by **CDN_Merlin** » Tue Jun 11, 2013 6:40 am

Bubba, I don't have any issues when I'm playing games. It's only on reboot. It's also an LCD.

BUBBALOU · Post by **BUBBALOU** » Tue Jun 11, 2013 7:01 am

CDN_Merlin wrote: It's only on reboot. It's also an LCD.

Exactly that's why I gave you the variations of the same problem

Or just pull 4 screw and inspect the 1.95$ worth of capacitors on the power board for your LCD monitor

I have repaired about 50 LCD monitors with the sleep on reboot.... Parts were under $2 labor was $75

CDN_Merlin · Post by **CDN_Merlin** » Tue Jun 11, 2013 7:46 am

I'll try this when it happens. Thanks

Foil · Post by **Foil** » Tue Jun 11, 2013 8:32 am

Another possibility:

Since you had it on DVI, and now you have it on VGA, it may be trying to switch to a resolution/rate which was supported under DVI but not VGA. As a test, you could try setting the res down to something like 1024x768 before rebooting.

CDN_Merlin · Post by **CDN_Merlin** » Tue Jun 11, 2013 8:52 am

Foil, never thought of that but I'm only running 1680x1050, I would assume a monitor that is only just over 5 years old is capable of doing it's native resolution using vga or dvi.

Foil · Post by **Foil** » Tue Jun 11, 2013 9:00 am

Not necessarily. I have a screen that will do 1920x1080 via DVI/HDMI, but only supports VGA up to something like 1280x1024.

Ferno · Post by **Ferno** » Thu Jun 13, 2013 6:50 pm

Also, check in the BIOS to see if the onboard video is set to priority over the dedicated video.

CDN_Merlin · Post by **CDN_Merlin** » Fri Jun 14, 2013 2:46 am

Fern, no onboard. I can get into the BIOS abut within 10 seconds it goes to "no signal"

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