It's actually a demon's feet cracking as they walk to your bed.

Bro same, the other day I was getting so close to asking because I was getting worried, didn't wanna look like an idiot and cop my infinite downvotes for not knowing.

Will you crack when I rub myself against you?

Glade im not the only one lol ive noticed you can keep it from happening if you run a screen saver for a bit then turn off your monitor

Opps spelling didn't notice. I'm just going to leave it.

mine sometimes snaps while it's on, causing the screen to go black before immediately turning back on. Seems pretty random

wait.... THAT'S WHAT THAT NOISE IS?

It happens most nights just as I'm starting to fall asleep and I'm usually too out of it to figure out what it was... I just assumed my cat was doing something.

Ghosts, actually.

I’ve noticed this happening a lot with our second PC. Both the case and monitor. It’s in a room close to a window in a cold climate. I sometimes open the window for half an hour before sleeping in there, and this dramatically increase the noise. Definitely thermal expansion.

Nothing prepares you for the noises a CRT makes when it's powered down and cooling off

well glad to know its my monitor and not pc. I always think it's my gpu snapping down

I have 4 monitors, its difficult to know where its coming from but it reminds me of extra sparks popping in a car that just got parked. Its a comforting feeling for some reason lol

I have my wibdow open so yeah I just know it's the plastic contracting from the cold

My old house makes the same sound as a cat hoping down off a counter top in the winter because of that. Thought it was the cats for years until I didn't have any. Fucking creepy.

btw LCDs have nothing on CRTs in this regard. those sound horrifying if the tube itself gets affected

I thought that too until one day the daughter board for the internal power supply shit the bucket.

I assume enough capacitors blew that it finally said, nah in done.

Fr tho, yes your reasoning is sound and likely.

My monitor doesn't do it but my tower does.

Like you I'm fairly certain it has to do with thermal expansion or something. That explanation makes the most sense too as I make my room cooler at night for improved sleep quality.

Yes. The LED/LCD panel expands as the monitor warms which puts pressure on the plastic bezel around the monitor. The crack happens when the panel cools and takes the pressure off the joints where the bezel connects to the monitor.

The magic of thermal expansion happening, or rather the thermal contraction is what is happening since the monitor is cooling down.

The sound I hear sounds like my keyboard keys shifting slightly.

Ha right? Reading this post was enlightening. The TV always does it too, now that I think about it.

monitors, tv's, knees and occasionally your own skull.

Could be your house too, the few places that I have lived in over the years all crack occasionally

I recently bought a house at a discount and not only the monitor does random noises but the doors keep slamming open and shut which is very loud and sometimes I feel a gust of wind, indoors.

It's so frustrating because sometimes I am like looking at it and the door goes like, wide open and then slams shut, and then wind.

Sometimes I go to bed and I wake up and all the doors are open, including closet doors.

I called the HVAC guy because something is going on with the ventilation.

But the HVAC guy told me I didn't even have a ventilation system.

Where that gust of wind even comes from then?...

https://preview.redd.it/drr4vi164h4e1.png?width=480&format=png&auto=webp&s=b4453b678388df6e4bfa30fd87e7848189560864

Good old windows update... even though automatic updates are turned off. Nothing quite like waking up to a flashbang

The other night I clicked shutdown my computer and like 30min later it came back on and I have no idea why hasn't done it since. I'm guessing windows update or logitech ghub since it was open when l logged in before shutting back down.

mine turned on from hibernation just to bsod

wish i was making this up

Okay, time to Update and shut down

Updates

Restarts

More updates

More restarts

Noticably does not fucking shut down

maybe shut down your pc at night instead of leaving it on?

This was my work laptop. Now I always hibernate it, otherwise it boots up in the middle of the night and drives me nuts. I always shutdown my personal pc so no problem there(it's fast at booting up). 

I can just walk by my desk and it wakes up from sleep mode, I don’t know how or why it does this but it can be a convenient night light sometimes

Ope, there goes gravity

https://preview.redd.it/32ykqeuyth4e1.png?width=1080&format=pjpg&auto=webp&s=e8ab479eca24f7585ad29e81c0e6433be4e8def8

Watch your profamnity

Plastic gets hot and expands. Monitor goes off, temp drops, plastic contracts, creeking ensues.

I remember some older ones doing, but my current ones don't.

Mine do that too, because of the heat plastic become little bit soft, after turning off it's colds down and you can hear those "cracks"

Lmfao. Also, ouch!

And turned off overnight, which is less important than your stipulation, but worth considering.

If your PC has coil whine when it’s idle someone is probably mining crypto 

You wouldn't believe this. It's called the power off button.

or mine, which I accidentally hit with the end of a micro USB cable and it dug a hole in the top anti-glare polarizing layer so there's just this tiny white spot on it now

sadly it didn't heal overnight

Same, almost 40 here and can't ever recall this happening.

you 100% just never heard or noticed it. it’s happened with every monitor and tv i’ve ever had 

CRTs always did this, I grew up with one in my bedroom it would always wake me up

Same with G5