RAM - Monitor Issue

Barrie1981

Thread Starter
Joined
Sep 18, 2020
Messages
7
Hi,

A week ago, my partners PC started to randomly shut up off refuse to power up.

With moderate IT knowledge myself, I checked the RAM.

I took out one of 8GB sticks, tried again and the PC turned on. Brilliant.

I then bought a new compatible 8GB stick and replaced the dodgy one. Problem solved or so I thought.

Over the past few days the PC will boot up as normal and get to windows and it will restart fine. However... If you turn the PC off, and try to power on, it posts as normal but there is no signal to the screen.

If, I then take one stick out, and turn the machine on it works. If I then turn the machine off, and turn it back on, no signal to monitor again.

I have tried, different combinations of using different ram in different slots, with just 8gb on its own, and the other with 16gb, and there is no pattern emerging at all.

So in a nutshell, when turned turning the PC on, unless I have taken a stick out, or swap the ram around, I will not get a signal to the monitor. If a combination does work, and I turn the PC off, the next time I turn it on (with the same combination that just worked) I get no signal to the monitor.

So random and strange but I am hoping someone can point me in the right direction.

Thanks in advance




RAM is DDR 3, 8GB 1600MHZ. (I have 3 sticks, 2 old and 1 new).

Motherboard is gigabyte ga-h81m-s2h
 

crjdriver

Moderator
Joined
Jan 2, 2001
Messages
42,054
If you turn the PC off, and try to power on, it posts as normal but there is no signal to the screen.
This makes no sense. IF the system completes POST you get a display ie motherboard splash screen, instructions on how to enter the bios, etc.
If you are not seeing the above, it is NOT completing POST.

I would start with some basic troubleshooting. System OFF and pw cord removed, open the case. Remove ALL ram. Blow the slots out with a can of air. Now install a single ram chip in whatever slot your motherboard manual says to populate with a single chip. Replace the pw cord and pw ON. If it works, let it run for a while, restart a few times.
 

Barrie1981

Thread Starter
Joined
Sep 18, 2020
Messages
7
Try 1

New stick on its own in slot 1

Turn on machine – NO SIGNAL

Turn off machine



Try 2

New stick on its own in slot 2

Turn on machine – WORKS

Turn off machine



Try 3

Return new stick on its own in slot 1

Turn on machine – WORKS

Turn off machine



Try 4

New stick on its own in slot 2

Turn on machine – NO SIGNAL

Turn off machine
 

Barrie1981

Thread Starter
Joined
Sep 18, 2020
Messages
7
And it is now constantly starting and restarting on its own

Changed back to slot 1 and its working and not restarting
 
Last edited:

crjdriver

Moderator
Joined
Jan 2, 2001
Messages
42,054
Pw ON and enter the bios. Check the following; cpu temp, 12V, 5V, and 3.3V values. Let it run in the bios for at least 5min to stabilize temps/voltages. Note whether the 12V rail goes up and down or remains stable. Post that data here. For a gigabyte board, the info should be under health in the bios however read your manual.
 

crjdriver

Moderator
Joined
Jan 2, 2001
Messages
42,054
Those look fine SO your pw supply is most likely OK.
Here is what I would do;
1 Make a bootable linux live usb; use either linux Mint or Ubuntu
2 Have the old ram in whatever slots the manual says to populate. Be sure it is fully seated
3 Boot the system with the linux live usb and restart a few times. If it runs fine under linux ie restarts without issues, then clean install windows
4 If you have the same problem under linux, then you know you have a motherboard and or processor problem. Much more likely motherboard since cpus usually either work or do not
Note your motherboard is now 6yr old and hardware that old is almost never cost effective to repair.
 

Barrie1981

Thread Starter
Joined
Sep 18, 2020
Messages
7
Just FYI - restarting is not the problem. It starts fine under a restart loop. Its when I turn the machine off that it never works the second time
 

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