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Monitor no signal after start up

Hello.

So just today, I have this problem where my monitors does not display anything after start up. I would turn on the CPU and everything runs fine (fans, power supply, etc) but my monitors stay undetected as if my computer was never turned on.

I did some research and, so far, I've tried:

-removing all or some of my RAM and switching them through diferrent slots.

-removing and reinserting my PCI and my graphics card

-resetting CMOS through the jumper switch and battery

-unplugging everything from the Power Supply and replugging.

-pressing the CPU on/off button for an extended amount of time.

So far nothing has worked and I'm completely stumped. Everything was working fine until my computer randomly crashed darker today and then froze in start up to now not displaying anything. Any help would be highly appreciated and thanks beforehand.

My specs are-

-8 GB ddr2 ram

-quad core Intel

-nvidia gt640

-corsair tx650 power supply

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Have you tried the monitor on a different computer?

i unplugeed and plugged the vga cable from both ends and then plugged them back in and it worked

I've the same issues with my pc too.

Pc specs are as follows :

Ryzen 2700x, msi b450 gaming plus, gtx 1060 6gb, 8gb x 2 ddr4 ram, 650w psu.

All i've done is switched on gaming boost and A-XMP in my bios settings and got a blank screen showing no signal. I've tried everything mentioned in that question but haven't succeeded. Help me please.

I too have same problem but today morning i just pressed f8 and started startup repair and my computer restarted and says no signal

My specs are-

2 gb ram

150 gb hdd

Asus geforce 210 graphix card

Dual quad core processor

It could be your PSU. My monitor would intermittently should the desktop but thengo black with the words "NO SIGNAL" and the monitor followed by going to sleep. Sometimes rebooting cleared it up but when my furnace went dead a few days ago the house temperature dropped from 70 to 37 degrees. At that temp the monitor never came on. I switched out the monitor with another and had the same results. Thinking the temperature was a factor I ran a hair dryer on high for a minute and suddenly the picture on the monitor came on. The picture stayed on for about 5-10 minutes then went black as the power supply cooled. I warmed it again and the picture resumed. At that point I felt very confident it was the PSU so I ordered and installed a new one and the monitor and computer are both working like new.

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Are you getting post beeps on startup ? If not you may be dealing with a power issue . Just because your fans are running and your motherboard light comes on doesn't mean you have enough power in the power supply to run the machine .Power supplies can die slowly and still appear ok .If you have access to another power supply try changing it out . You may also want to try a different monitor or test your old monitor on another computer. depending on your motherboard you could try resetting the mem button common on Asus boards. Also you mentioned you've disconnected the power and that you've held down the power button for extended periods . Did you do this together? if not try unplugging from power and holding the power button down for roughly 60sec then plugging in and rebooting. Finally as dumb as this is going to sound but it happens to the best of us... is your monitor turned on and plugged in? Just sayin Hope something here helps and good luck

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It could be your PSU. My monitor would intermittently show the desktop but then go black with the words "NO SIGNAL" and a few seconds later the monitor followed by going to sleep/powered down. Sometimes rebooting cleared it up but when my furnace went dead a few days ago the house temperature dropped from 70 to 37 degrees. At that temp the monitor never came on. I switched out the monitor with another and had the same results. Thinking that temperature was a factor I ran a hair dryer on high for a minute, blasting the hot air on the PSU and suddenly the picture on the monitor came on. The picture stayed on for about 5-10 minutes then went black as the power supply cooled. I warmed it again and the picture resumed. At that point I felt very confident it was the PSU so I installed a new one and the monitor and computer are both working like brand new.

Reseated all my ram sticks and gpu and it worked. must have been something slightly loose

Pc show display after removing battery or change cmos setting but when i shutdown and start again then again no signal error everytime when i remove battery or change cmos pc show display but only for one time

@M Zeeshan

Have you checked that the CMOS battery is OK?

Usually they are non rechargeable 3V DC coin cell batteries. If the battery is <2.6V DC replace it.

Ok for me when I power on my pc for the first time, no signal comes to the monitor but when I do it a second time it comes on. What is going on?

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This is the first time I've ever decided to post a piece of advice to any website/message board because I think it would really help a lot of people. I had the exactly same problem after installing a new motherboard. I tried everything I could think of and all the tips I found online; to list just a few: updating my BIOS, reinstalling Windows 10, changing from DP cable to HDMI, reinstalling all my drivers, reinstalling just graphics drivers, plugging and unplugging my Nvidia graphics card several times, cleaning/vacuuming every single component (my comp is as clean as a whistle - looks brand new, trying all kinds of combinations in BIOS settings, etc - nothing worked.

 

And here is how I SOLVED IT! After reading some unrelated advice about the "turn on fast start-up" function in Windows 10 and reading about how it can cause certain booting problems, I thought I might as well give it a try, nothing left to lose. So, I went to Control Panel/Power Options and under "change setting that are currently unavailable" turned off the fast start-up. Voila, problem solved! I'm guessing there is was kind of incompatibility between my motherboard (Intel Desktop Board DQ77MK) and this particular Windows setting. After spending a week dealing with this issue and going out of my ever-loving mind, you can imagine my relief. I'll make sure to post this advice on as many message boards I can to help other miserable souls like myself.

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Hi,

Considering the thread is about no monitor signal after startup, just wondering how you changed the settings in Windows if the display wasn't working?

what version of windows are you using? tx

dude ur an absolute legend! This *!&$!&$^ thing has been plaguing me for over a year! Thank you so much for this!

@jayeff there are 2 different issues here, but the symptoms are the same. One is purely a hardware issue(RAM, PSU cables and other) the ohter one is a software issue. Iv'e eaten my nails over this. I swapped everything, mobo, psu, monitor, gpu, cpu bios update etc.. all of it and was still experiencing this when the system needed to auto reboot, for an update for example. NOTHING WORKED. The only thing that remained unchanged was Win10. This change in power options has worked for me. Finally..

@Rob Weaver The latest Windows 10 version 64 bit

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If your motherboard has an onboard graphics card you might want to try unplugging your PCI-E graphics card and plugging a monitor into the onboard graphics card. This will verify whether or not it is your PCI-E graphics card that is faulty or not.

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I get the some problem and tried all this metods, but don't work.

I talk with my techers and they tell me to remove the PCI graphic card, clean the contacts, with an ruber and a brush (with soft bristles), and put that again, and now are working normally.

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Had the same problem and it ended up being a bad memory stick. Try removing the memory and see if you get the error beeps. If so then try one stick at a time and see if that solves the problem.

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Tried everything except replacing parts , then solved the problem by vacuuming the air vents and then took off the lid and vacuumed the fan area and memory sticks . No issues for weeks now.

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I had the exactly same problem after installing a new motherboard. I tried everything I could think of and all the tips I found online; to list just a few: updating my BIOS, reinstalling Windows 10, changing from DP cable to HDMI, reinstalling all my drivers, reinstalling just graphics drivers, plugging and unplugging my Nvidia graphics card several times, cleaning/vacuuming every single component (my comp is as clean as a whistle - looks brand new, trying all kinds of combinations in BIOS settings, etc - nothing worked.

And here is how I SOLVED IT! So, I went to Control Panel/Power Options and under "change setting that are currently unavailable" turned off the fast start-up. Voila, problem solved! I'm guessing there is was kind of incompatibility between my motherboard and this particular Windows setting. After spending a week dealing with this issue and going out of my ever-loving mind, you can imagine my relief.

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These solutions are mostly from experience so they are not fully reliable…

I suggest reading this whole article before starting anything.

Complete Guide/Solution:

  1. Check if the monitor power cable is plugged in and or video cable (eg. HDMI). Quite funny although has happened.
  2. Check video cable is broken by testing with another cable or looking for visible defects.
  3. Check if you have a broken monitor by checking the monitor status light and trying with a different monitor.
  4. If these steps didn’t work than sadly it’s time to start looking inside our PC… Make sure to unplug the PC anytime your touching anything inside the PC. Try avoiding touching any tiny parts on the components as well.
  5. Check if the PC’s RAM and GPU are fully inserted into their slots and in the rights slots. Some motherboards require RAM sticks to be in certain slots first before others.
  6. Clean any dust out of the PC as this may cause shorts and also stop the PC from cooling properly.
  7. If none of the steps up to here has worked than their might be a broken part:
    1. Broken RAM: Check if the PC works with each individual RAM stick in the first, second, third and fourth RAM slots. The PC will split its data evenly between each stick; this means if any single one of the RAM sticks are broken than the PC will not function.
    2. Broken GPU: If your CPU has onboard graphics than it will be easy figuring out if your GPU is broken. Just plug the monitor/video cable into your motherboard and see if you get an output. If so then your GPU is the problem. Otherwise, try to test another working GPU in your PC.
    3. Insufficient PCU: If you have bought a PCU with bad reviews or a PCU that cant handle the amount of wattage your parts need than this could be a problem. Some knock-off PCU’s actually can only supply down to half as what the specified to be able to do.
    4. Broken PSU: This one will be pretty obvious. If none of the components (including fans, LEDs) is turning on then its probably a signal of a broken PCU.
    5. Broken CPU: This one sucks to check although check if the CPU cooler is properly installed by removing it and checking if the CPU coolers thermal paste has spread on the CPU well. If so then also check if the CPU is cracked by removing it, holding by the sides, and also check if any pins are damaged on the CPU.
    6. Broken Motherboard: This one is quite hard to discover although if everything seems to be not running except the PCU fan than this might be true. It is also quite common as motherboards are quite complicated to manufacture. Check to see if there is any visible defects and check all the slots to see if they're damaged.

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I have had similar problems - main monitors not lighting up - BUT this morning after reseating graphics card etc - still nothing - I then turned the monitor - which was ON, turned it OFF, and after a couple of tries it DID show the screen and allowed me to log -i n

1: Turn off pc

2: unplug your cable monitor and one in your gpu

3: put them both back in

-This is what helped me, after 2 hours constantly looking for solutions.

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I'm having this same problem and I don't know what to do anymore. I've tried a different GPU - no signal. Bought different ram - no signal. Tried a new motherboard - no signal. New CPU - no signal. I am stumped as to what the issue could possibly be

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Hi,

Assuming that your problem is also "Monitor no signal after start up" as per the thread.

You didn't say if you tried your monitor on a different known working PC to check if it worked OK, a different known working monitor or a new monitor cable or even a different video output signal type (if available) e.g. HDMI, vga, DVI, DisplayPort, etc between the motherboard and the monitor.

Basically prove the fault to be in the monitor or the PC. So far from what you said you concentrated on the PC only

@jayeff right, sorry about that. The first day it stopped working I tested the monitor on another computer and it worked fine, and HDMI is the only output signal type I have to work with.

And for more clarification, I tried 3 different HDMI cables on my monitor and I still got no signal

I tried two different motherboards - both of them seem to work fine but I get no signal. I tried two different CPUs on both motherboards and no signal. I tried a different GPU and no signal either, which I had to return. I also tried new RAM and still nothing. The only thing left I haven't tried is a new power supply, which I'm waiting on, but it doesn't seem like that's the issue because the PC appears to start up as normal and stays powered on, but I'm just getting no signal to my monitor.

Hi,

Have you tried starting in "safe mode" to check if you get a display or not? (this is assuming you have Win 10 as the OS, if not search for "{insert OS} safe mode" to find out how.

On the two new motherboards that you tried did they have onboard graphics or were you always trying a graphics card?

Perhaps go back to basics.

Disconnect the HDD from the motherboard and check if you can get into BIOS with a display. With most PC you press either F2 or Del after power on and before it boots into Windows to get into BIOS

If you can get a display with the BIOS menus that at least proves the hardware. It then also appears like it is a Windows problem.

What is the motherboard make and model and what OS is installed on the HDD?

Thank you so much for all of your help. It is dearly appreciated.

Both of the motherboards that I tried have integrated graphics, but I've never been able to use them for some reason so I'm unable to tell now. My original motherboard is a MSI B250M Mortar Arctic. The second one I got is a biostar tb250-BTC. The b250M is the one I'm currently using because it seems that it's working fine, and both motherboards are returning the same results.

Upon removing the HDD, the same thing is happening. I just can't get any signal on my monitor. I'm running Windows 10 and if I'm getting into bios or safe mode I can't see it. I do know that before it went out the first I heard the device disconnected sound, so I'm not sure if that info helps at all? I've swapped out every possible part besides the psu (which I'm gonna get next weekend) at this point and I just can't figure it out. Sorry if I'm repeating myself but I've been dealing with this for a couple of weeks and my patience is so thin at this point

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Disconnecting HDD worked for me. resetted

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Did you completely reset your hdd or did you just unplug it, I tried the comment where you go to control panel and search the power option and turned off fast boot up. This fixed my problem but I feel like my pc is slower and I just built it. It has,

Gtx 1060 6gb

Thermaltake 600watt psu

Ryzen 5 3600

16gb Corsair ram

1tb hdd

250gb ssd

My windows is installed on the hdd

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I solved this issue by swapping my PSU with a new one. The Mobo was indeed receiving power and everything was turned on including my ARGB fans and AIO cooler. I did everything from reseating the RAMs and unplugging all the cables. So I thought that it was a CPU issue and the first thing I check was if it receives power from the CPU power cable. Turned out, the 8 pin cable was broken.

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I had this issue with a Samsung SD850 32”, would be fine for a long time then start up again with the no-signal screen after turning monitor on (after previously turning it off while the system was still on). It usually happened after a windows update. The only way to get the screen back was to reboot. The other day I applied a screen saver out of nowhere, thought my kids would like watching it. Well, it turns out the screen saver continues to run - sending video output to the monitor - even when its off! Now, whenever I turn on my screen, the saver is faithfully running and I’ve had no issues since. Its almost like powering off the monitor causes the GPU to stop providing output all together and it won’t trigger back on. I have 2 different GPUs right now (calibration reasons) and could sometimes get around the issue by switching video outputs to the other card. Once the system realized a monitor was connected, I could occasionally switch back to the original GPU. Running a screen saver and powering off the monitor has been the best solution for me so far.

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