Black screen - how do I test components to find failure?

mcsmoothearl

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Jun 28, 2010
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18,510
Custom build from 2012 (a friend built it - I kind of looked over his shoulder and pretended to help)

CPU: i5-3450S
MOBO: Asrock H77M-ITX
RAM: Corsair Vengeance 8GB (2x4GB) DDR3 1600
HDD: WD 1TB Caviar Black
OS: was Win7 Home OEM, but teen daughter inadvertently fell into the free upgrade to Win10 trap last year
OPTICAL: 8x slim internal DVD brn

... packed away in a Silverstone SGO5BB-450 with the propriety 450W PSU and just using onboard graphics (no separate GPU).

Computer was working fine just a week ago – went to turn on computer, and just end up with a black screen with the cursor. BIOS screen would flash on and then disappear rapidly, so I hit some of those suggestions like F11 and whatever but couldn't make any sense of any of the choices and they didn't seem to do much anyway. Ended up eventually just pushing some buttons and now I don't even get a black screen with the cursor… It just won't interact with the screen at all.

Short of disassembling the computer and rebuilding it (which I doubt that will even do anything)… Do you guys have any suggestions? The guy who help me build it - I don't really speak to him a whole lot anymore so that's not really good option. PC powers on just fine… Could it be that the CPU or the hard drive or the RAM has gone bad?

I guess I can find a computer person on Craigslist or something like that if I have to
... I could even just tear it apart and put new parts in it - but that's the more expensive option for something that's probably relatively simple ... but any advice you guys can give would be helpful.
 
Solution
The issue with figuring out what is wrong is that you were just hitting random buttons, so what the issue may have been originally may not be what is going on now, and you could have several things happening at once now.

Can you get into the BIOS?

If it does, get a replacement hard drive and try installing Windows 10 on that. If it crashes after that, try running with one RAM stick at a time, try the RAM in different slots if that also does not help.
 

mcsmoothearl

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Jun 28, 2010
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18,510


I know ... "button-mashing" only works in certain video games ... :'(

I did stick the original Windows 7 disc into the optical drive, hoping that I would be able to revert to the original OS ... I think it's after THAT that I couldn't even get the BIOS screen up anymore. Like, I guess I could "test the RAM" by sticking it into my other computer (older i5-760) but I'm guessing that has nothing to do with my problem ...CPU can't be fried, or I wouldn't have initially been able to get to the BIOS screen, right?

 


So you can get into the BIOS now or not? If not, then RAM, Motherboard or possibly power supply is an issue. Try without the hard drive attached also. Maybe a new SATA cable.
 
Solution

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