Computer Turns On But No Display - Led Light On Fan Spinning - HARDEST Troubleshoot?

When a computer turns on but no display on monitor appears, although the led light is on and fan spinning can be observed, this means the computer may have failed the POST(Power On Self Test). If this happens before a successful POST, one or more of the following will be at fault; Power Supply Unit, Motherboard, Processor, Ram, Graphics Card Unit.

CASE: IONX KZ16
PSU: Corsair TX750M
CPU: Ryzen 9 3900x
MOBO: Asus B450m-k
RAM: 16 GB (2 x 8GB RAM)
GPU: Palit GTX1080
DRIVE: Sabrent 512GB SSD

In this troubleshoot a pc video, HealMyTech teaches you how to eliminate each component one at a time and fix your NO POST issue.

However is this happens after a successful POST, i.e no display on monitor, then the issue could be one or more of the following: Video cable, video post, monitor. Watch this troubleshoot video for more details:

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AMD Ryzen 7 3700X (8 Cores up to 4.4GHz, 32MB Cache)

Memory: 16GB Corsair Vengeance LPX 3200MHz (1x16GB)

Hard Drive: Seagate FireCuda 510 SSD 500GB M.2 NVMe & Seagate 1TB BarraCuda

GPU: NVIDIA GeForce RTX 3060 Ti 8GB *

Power Supply: Corsair 650W CV650

Motherboard: ASUS PRIME B450M-A II

Cooling: Antec A400 RGB Cooler

Case: Onyx

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Thanks for watching!

#nodisplayonmonitor #troubleshootacomputer #computernotturningon

[TheDeasman]

I am aircraft mechanic. We do the same thin g for troubleshooting, use known working parts to swap out till you find the issue. Saves millions of dollars a year. Thanks for the video.

[zemissailor]

My pc fans are running and my pc is on butmy keyboard and mouse aren't lighting up or working nor is the signal on my monitor

[pooyadelfani]

He changed the motherboard with a new one and it worked, for those who are wondering and are frustrated with their gpu not working, saved you 14 mins!

[mr_cobolts]

Thank you for spending 5 mins talking about the specs of that PC... So useful.. it's almost like I searched "how to hear random shit that has nothing to do with what I'm looking for"

[blank]

Figured mine that it was either the bios settings or the static. Fixed mine by removing the gpu, then the cmos battery to reset the settings for five-6 min, hold the power button for thirty sec to drain the static, and finally plugged everything back. GPU now displays.

IMPORTANT: (Make sure to have done the unplugging method above before proceeding) Also make sure to understand the BIOS configuration for the display. Sometimes, PCI-E (Display output for the GPU) gets interchanged with the iGPU (Display output for the integrated GPU of your CPU; most Intel CPUs have this) or the other way around. To check if that's the case, you can try plugging your monitor to the iGPU instead of the GPU or the other way around and check if it turns on. If it does, then there's a possibility that your BIOS is not properly configured to show display through your other display output. You can find it in most BIOS under 'Display Configuration' or the likes. Hope it helps!

[adnanefakir]

Hi guys one thing that you should check before doing any action is your motherboard cables connection, try to replug each cable at be sure that's well inserted, that was the issue that I faced pretty stupid 😫😫

[memeeater]

If the motherboard's the issue, then try removing the cmos battery for 15 minutes or using the screwdriver to touch the cmos pins for 15 seconds to short circuit it. What that will do is reset the cmos (BIOS). That helped when my PC wouldn't post cuz of me being an absolute dumbass for messing with the XMP profile.

[saher]

I actually switched my hdmi cable to the older cable and it worked. It was all about the bios system settings. It was not setup to detect pci-e or hdmi on the motherboard. Just the standard regular old vga cable fixed the problem for me

[zulu]

I suspected the board to be the culprit in facebook simply by knowing that the chipset was a b450 type, but I didn't actually think that it would be faulty though. One thing is for sure there would of been no other way to know for sure, without swapping it.

[blainejb]

Good videos, have troubleshot multiple computers and your process is spot on what I do as well. Great work, great information.

[ldGuy]

These types of videos are less than worthless to the average consumer. The average person doesn’t just have a shelf full of spare parts to swap in and out. People who do have a shelf filled with parts already know how to do this. So who is this video for? Oh to have people who are having a problem click and get no help. Cool. What a joke the whole computer industry and tech YouTubers are.

[samueltheweber]

Today I replaced the pads on my MB and GPU heatsinks, but had forgotten to plug the CPU cable in after reassembly. I panicked after getting no image and thought I had short circuited my graphics card. So I found the cable while watching your video, and now my PC works again lol!

[georgevalentinecruz]

true . having parts is key for making PC diagnosis

[Jesse___H]

Did you try to clear cmos before you just told the guy he needed a new motherboard

[Mr.Handymaan]

First things first to ever try when you get this problem is to unplug the powercable, then remove the battery on the motherboard becuase many MANY modern motherboards get fucked up then move around the PC and somehow the motherboard loses its "memory" or something.. 19 of 20 times its its so simple atleast.. cheers!

[omnipotentlenny]

I need help! I’m finished my first PC build and the test outside the case went well, the bios showed up on my motherboard and it was dandy! BUT now that it’s inside the case and everything is still running, I plug in my DP cable into the GPU and into the monitor but now the monitor says it’s receiving NO signal from the DP cable. I’ve got no idea what’s wrong

[rocketbunnyk]

I am very suspicious it's my motherboard causing the issue. It had been repaired once for the same issue. But now, I decided to buy a new motherboard. I'm done dealing with shit. Good video by the way.

[cliffrd]

Change new ram, still not working.
Change power supply, still not working,
Reset CMOS, still not working.
New Motherboard, still not working..
How about CPU ?
If CPU problem, you still can boot ?

[SynDeus]

I'm having the same issue. Everything turns and spins, but no signal. I swapped my GPU into the lesser PCIE slot which is 2.0 and it works. I think I fucked up my PCIE 3.0 slot, but i''m still testing

[stark_energy]

The easiest way I did was to check the beep sound when I unplugged all the RAM. Without RAM there would be long beep:
1. If the beep does not exist (you must make sure the speaker buzzer system of motherboard is fine, some motherboard failed to beep at all or your buzzer is broken/reversed) then it must be either the processor or the logic/Super IO motherboard (which is hardest) and after changing the processor to known working & compatible one still does not sound beep then it is clearly the motherboard issue which require advanced electronic test such as MOSFET and voltage output.
2. But if there is a long beep then most likely just VGA (Graphics Card) or RAM issue. Some motherboards (not all) will generate unique sound if the VGA is failed. Try using onboard or switch to another VGA. If the problem persist try replugging RAM to different slot or change the RAM to known good one (borrow one if you don't have).

If you are a technician usually you have something like "PCI Tester PC Analyzer Diagnostic Card" to show the current code that the motherboard is currently stuck at.

PS: I'm a PC technician for 8 years.