PC starting with power wire and ignores power button

[Warlord4Hikage]

Like, i was cleaning PC from dust and then, when work was done, i plugged power wire and PC started to work.
Power button didn't shine and didn't work. Reboot button did work too.
Display is off.

Was trying to check RAM - didn't help (which means problem not in it).

Found few helping sites and yt videos - they didn't help.

Edited: PC from 2010. Something from office kind. Asus.

[Warlord4Hikage]

Origineel geplaatst door Unicorn - Rainbow Unit:

prob just put the power plug connection on the wrong pin and miss aligined them

[Warlord4Hikage]

Origineel geplaatst door Talby:

That is an interesting - if you plug in power to PSU it auto-starts, like you are jump-starting the PSU manually to test it like this:
https://www.youtube.com/watch?v=Ea1dcJ0QyAE

for some reason your motherboard is forcing power_on signal (the green wire to ground in the video) without waiting for the power switch signal - suspect that the board is bad, possible something caused static when cleaning, agree you will have to "start from scratch" with the motherboard connections as Illusion mentioned.

good guide here:
https://www.technewstoday.com/how-to-test-motherboard/

Guide just saying things that i already done or know on 100% that it's not it.

[Illusion of Progress]

Origineel geplaatst door ℐ ❤ ℋ𝒾𝓀𝒶𝑔𝑒:

I plugged power wire in his port and PC instantly turning on.

This part may be normal.

Many motherboards have a behavior to automatically power on after power was suddenly lost. Many motherboards also have an option to choose whether this happens or it can be disabled, but in my experience the default is usually on. So when the BIOS settings are lost or if the setting was never changed, this part might be normal.

Origineel geplaatst door ℐ ❤ ℋ𝒾𝓀𝒶𝑔𝑒:

Power button didn't work.

Can you clarify this part?

Does this mean if the PC is off, and you press the power button, it does not turn on?

We know it powers on by itself from the above, so the power button should also power it on. If not the power button is bad or connected wrong.

You need to find out if the issue is with the PC, the wire connection to the motherboard, or the power switch itself, and here's how.

Check the wire connecting from the power button to the motherboard. Ensure it is connected in the proper spot (motherboard manual will show where). It's usually covering two metal pins.

If it is connected properly, then that is not the problem. Now test if the power switch works by ruling it out. Disconnect the wire and "bridge" the connection with something metal. This means use a screwdriver or something to connect those two pins. When you do this, does the PC power on now?

If it does, the power switch on the case is faulty.

If it does not, the power switch is (likely) fine and the issue is the PC itself.

Origineel geplaatst door ℐ ❤ ℋ𝒾𝓀𝒶𝑔𝑒:

Cleaning was accurate and I didn't touched power button.

Was unplugging everything outside, was trying to replace RAM in different socket - nothing.

You'll need to reseat (remove and put back) everything, not just RAM. Power cable from PSU to motherboard, power cable from PSU to hard drives, cables from hard drives to mothebroard, RAM, graphics cards, etc.

This is to try and rule out a bad connection. If this still doesn't help, then a part may have failed. The cleaning may or may not have been coincidental timing.

[Warlord4Hikage]

Origineel geplaatst door Illusion of Progress:

Origineel geplaatst door ℐ ❤ ℋ𝒾𝓀𝒶𝑔𝑒:

I plugged power wire in his port and PC instantly turning on.

This part may be normal.

Many motherboards have a behavior to automatically power on after power was suddenly lost. Many motherboards also have an option to choose whether this happens or it can be disabled, but in my experience the default is usually on. So when the BIOS settings are lost or if the setting was never changed, this part might be normal.

Origineel geplaatst door ℐ ❤ ℋ𝒾𝓀𝒶𝑔𝑒:

Power button didn't work.

Can you clarify this part?

Does this mean if the PC is off, and you press the power button, it does not turn on?

We know it powers on by itself from the above, so the power button should also power it on. If not the power button is bad or connected wrong.

You need to find out if the issue is with the PC, the wire connection to the motherboard, or the power switch itself, and here's how.

Check the wire connecting from the power button to the motherboard. Ensure it is connected in the proper spot (motherboard manual will show where). It's usually covering two metal pins.

If it is connected properly, then that is not the problem. Now test if the power switch works by ruling it out. Disconnect the wire and "bridge" the connection with something metal. This means use a screwdriver or something to connect those two pins. When you do this, does the PC power on now?

If it does, the power switch on the case is faulty.

If it does not, the power switch is (likely) fine and the issue is the PC itself.

Origineel geplaatst door ℐ ❤ ℋ𝒾𝓀𝒶𝑔𝑒:

Cleaning was accurate and I didn't touched power button.

Was unplugging everything outside, was trying to replace RAM in different socket - nothing.

You'll need to reseat (remove and put back) everything, not just RAM. Power cable from PSU to motherboard, power cable from PSU to hard drives, cables from hard drives to mothebroard, RAM, graphics cards, etc.

This is to try and rule out a bad connection. If this still doesn't help, then a part may have failed. The cleaning may or may not have been coincidental timing.

Power button i mean when PC turning on instantly with power wire PC ignores both buttons - power button and reload button.

I was removing almost everything, except motherboard.

I was studying on programmer, not on other side of PC knowledge.
So i am kinda scary to do things for my own, with such broken arms. Metaphorically (about arms).

[Illusion of Progress]

If you disconnected and reconnected everything, and it doesn't get it working, then you might have a faulty part. With stuff ten years old, it's not especially uncommon.

If this included the monitor cable, and the PC has a dedicated video card, make sure the monitor is connected to the graphics cards and not the motherboard output.

At that point it's up to you whether you want to further troubleshoot it to replace what may be a bad part, or just replace the whole PC off with how old it is. If you want to troubleshoot...

If the PC is powering on but not POSTing, so the PSU is probably not bad.

If your CPU has onboard video, try removing the video card (if any) and connecting the monitor to the onboard video. If this makes it work, video card is likely bad. If this doesn't make it work, video card is likely good.

CPU is unlikely to be bad (not impossible though).

Motherboard or RAM would be most likely to stop it from POSTing if the above passes checks.

If you know what hardware you have (CPU, motherboard, RAM, PSU, GPU, etc.), that should almost always be provided in troubleshooting scenarios as well.

[_I_]

did you unplug the front panel connectors, and not plug them back in the exact same way?

[Bad 💀 Motha]

Then try to press and hold the Case Power Button for 5 seconds.
If this does not force the PC to shut-off then you definitely have a front panel connection issue.

I would also lay down the PC on its side so the Motherboard is flat.
Remove all RAM and also the GPU card and then reseat them all properly. It wouldn't hurt to remove all the RAM and GPU card and blow out all of those slots anyways. Then when you put these back into place ensure they go all the way into their slots evenly and such. Then ensure the GPU power connections from PSU get plugged in properly. Once the GPU is secure and you are ready to turn on the PC, ensure the Display cable gets plugged into the GPU Card as well before powering on the PC. Also ensure that the Display is powered on.


If you upgraded RAM or GPU then allow up to 2-3 minutes for the PC to turn on where it does the BIOS POST process.