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Honor Student
Posts: 2
Member Since: ‎02-24-2011
Message 1 of 3 (2,266 Views)

Monitor loses signal, computer freezes...

Recently, a problem popped up. When I had left my computer downloading a file for a few hours (I left the house), the monitor had lost the signal. I had to restart the computer. In the last few days, the problem has become more frequent as the monitor goes to sleep earlier each time I use the computer, even while using it. I have tried to use another monitor, and even tried the TV, but it doesn't help. I know that the computer freezes when the monitor goes to sleep, as the music starts looping (You know, the same half-second of a Justin Bieber commercial over and over Smiley Mad ). Anyways... I have now initiated a system recovery since none of HP's solutions worked for me. It blows out the harddrive, so there shouldn't be any conflicting or corrupted software left to cause this. Then, when the new programs are installing (Before inserting any recovery-disks), at around 30% or 5 minutes in, no signal. I don't know what's causing this, or how to solve it. I just tried connecting with a VGA cable instead of the DVI or HDMI previously tested, no luck so far.

I am using the Pavilion m9670sc...


Thank you for reading, I would be very happy if anyone had a solution.

Posts: 25,792
Member Since: ‎07-17-2009
Message 2 of 3 (2,259 Views)

Re: Monitor loses signal, computer freezes...



Boot into the bios (F10 setup) at the HP blue screen and run some diagnostics.


Try this procedure:

Unplug the PC and open it up. Clean out all the dust. Carefully remove and replace all the cables going to the motherboard one at a time. Do the same for the memory dimms and the video and sound cards if you have any.  You might want to buy a can of compressed air to blow the dust out of the CPU heat sink.  Plug your PC back in and give it a go.



Try this bootable memory diagnostic CD. Download memtest86 iso file and burn it to disk using Imgburn.


When a monitor keeps losing the video signal it might be a bad video card. 

HP ENVY 17T-u100, i7-7500U, NVIDIA 940MX, 16GB, 512GB m.2 SSD
HP Photosmart 6520, HP Deskjet 1112
HP Touchpad, HP Chromebook 11
Custom i7-4790k, Z97, 16GB 2400 MHz DDR3, Intel 750 PCI-E SSD, (2)Samsung EVO 840 SSD, Corsair HX650, GTX 980TI, Corsair H75 water cooler
Windows 10 Pro in UEFI mode - production system
Windows 7 and 8 in UEFI mode - test systems
Honor Student
Posts: 2
Member Since: ‎02-24-2011
Message 3 of 3 (2,251 Views)

Re: Monitor loses signal, computer freezes...

The BIOS doesn't work, I've tried.

I opened the case and found a lot of dust (whoopsie) and a stuck fan. The fan in question was to cool the graphics-card, so I guess the problem's solved. I'm going away for the weekend but I'll do the cable-thing aswell if cleaning out the dust doesn't work. Smiley Very Happy

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