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Honor Student
Posts: 2
Member Since: ‎02-24-2011
Message 1 of 3 (2,314 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.

0 Kudos
Posts: 26,601
Member Since: ‎07-17-2009
Message 2 of 3 (2,307 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 laptop 17t u100,
HP Photosmart 6520 and HP Deskjet 1112
Custom 1151 socket Z270 Intel i7-7700k @4,600 Mhz, 16GB Corsair 3000 Mhz dimms
Corsair H75 water cooler, Corsair CS 650M power supply
RAID 0 (dual Samsung 960 EVO m.2 240GB) boot system
Dual Samsung 840 EVO SSDs 500GB data storage, Intel 750 PCIe SSD 400GB
ASUS ROG PG279q @144 MHz
Windows 10 and Windows 8.1 Pro x64 in UEFI mode
Honor Student
Posts: 2
Member Since: ‎02-24-2011
Message 3 of 3 (2,299 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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