Question Computer turns on, completes POST, but doesn't display anything

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LauroSalvatore

LauroSalvatore

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Jul 14, 2019
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Pretty much what the title says, my computer turns on, all fans turn on, HDDs turn on, peripherals turn on, but not even BIOS displays, monitor does NOT turn on when I turn on my computer, but it DOES turn on after a few seconds (30 or so), but still no display, it just turns on along the keyboard start up sequence and the mouse leds.

I've tried pretty much everything, unplugging everything that isn't vital, like HDDs, SSD, front panel USBs, front audio, USB peripherals. Tried using the motherboard hdmi output, tried changing display cables, monitor works just fine, tried swapping ram slots, tried cleaning ram slots and ram, reset BIOS, reinstalled CPU 3 times, cleaned everything, applied thermal paste 3 times, checked all cables, case isn't shorting either cause I also tried turning on the PC with all the components just on top of a box, outside of the case, idk at this point, it's certain that something died, but I can't tell what.

TL;DR: Computer doesn't display anything, not even BIOS, but seems to be completing POST, tried everything to fix it to no avail.
 
i7 6700 (non K)
Single RAM stick 8gb 2400mhz Corsair Vengeance LPX
GTX 1050ti
Asus Z170M Plus
And I think the PSU is also a Corsair one, 400w bronze
and 2 HDDs, a WD Blue and a generic one that seemingly has no brand lol
 
USAFRet said:
What was the last thing that happened before this started?
Click to expand...
Not much, I know the mobo was faulty, meaning that I would take a few tries for it turn on sometimes after turning off, I had to press the button, nothing would happen, then I'd have to switch off the PSU, switch it on again, and then it would turn on, but besides that, I had it working like that for well over a year, no issues, no random shutdowns, no freezes, no stutters, not blue screens, no issues whatsoever besides sometimes taking a few tries to turn on. But what happened before it decided to not turn on again was a trip, I moved to a different country (same voltage, same HZ), and after that it just never displayed again. Weirdly enough it also never struggled to turn on on first try either, now it turns on on first try every time.

I shipped each component just inside of my suitcase along some clothing to keep it safe from hits or impacts.
 
USAFRet said:
So, faulty motherboard, that has finally given up.
Click to expand...
I thought so too, but I sent it to a "tech guy" in my city, and he said that the CPU is dead (CPU is 2 years old btw)

Idk if they were lazy with the tests and discarded the CPU on the first try, or if the CPU actually died somehow.
 
Yeah of course it can fail but I never stressed it at all, obviously, neither the motherboard nor the CPU allow overclocking or increasing voltage (or so I know), it has always had really good cooling, never going over 75 C, it has always been plugged to a voltage regulator so it has never had voltage spikes either. That's why I think it's kind of weird that the CPU somehow died.
 
LauroSalvatore said:
Yeah of course it can fail but I never stressed it at all, obviously, neither the motherboard nor the CPU allow overclocking or increasing voltage (or so I know), it has always had really good cooling, never going over 75 C, it has always been plugged to a voltage regulator so it has never had voltage spikes either. That's why I think it's kind of weird that the CPU somehow died.
Click to expand...
Well, something has failed.
Motherboard, CPU, something.

Only way to diagnose is to swap in new parts.
Then brings the question...how much do you want to invest in "fixing" this old platform?

For the cost of new CPU/motherboard, you could probably bu a much newer platform.
 
USAFRet said:
Well, something has failed.
Motherboard, CPU, something.

Only way to diagnose is to swap in new parts.
Then brings the question...how much do you want to invest in "fixing" this old platform?

For the cost of new CPU/motherboard, you could probably bu a much newer platform.
Click to expand...
I mean... Yeah, that's fair, but idk about PC prices in Chile, and I also don't really need THAT much more of a PC, I just play Valorant 🤷‍♂️

If anything I'd benefit from more RAM for dual channel and lower latency.

That brings the question, what would be a newer platform's specs that isn't overpriced as I don't really have that much of a budget, yeah I can pay a new CPU or a new mobo, but idk about a whole new computer.
 
LauroSalvatore said:
That brings the question, what would be a newer platform's specs that isn't overpriced as I don't really have that much of a budget, yeah I can pay a new CPU or a new mobo, but idk about a whole new computer.
Click to expand...
You need a new CPU, mobo, PSU, optional new kit of RAM, and optional NVMe SSD, or SATA SSD.

Pretty much the only thing you can reuse is the GPU and RAM. And drives obviously.


You can look at prebuilt computers. Probably some computer shop that can sell you a fairly priced PC. It may not be any better than if you build one yourself.
 
LauroSalvatore said:
And uh... About this...
Click to expand...

Look at prices of i3 12100, B660 or Z690 motherboard, any PSU with 7+ year warranty ~450-550w (400w models are becoming rare). A Crucial P3 NVMe would be very nice if you can afford it.

If you want to try AMD, R7 5700G + B550M mobo would be a great combo.

Buying older components may not be cheaper.

If that's above budget, look at used PCs, but... they're cheap for a reason. At least with new things you will be able to use them for years.
 
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