Trouble booting PC

ovia

ovia

ovia

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Joined
10 Jan 2005
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551
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Trowbridge
Hi all,

I wonder if anyone could provide some assistance with the below issue?

My PC has run flawlessly since I first built it a couple (or so) years ago. Since upgrading to Windows 10 I was getting constant restarts on shutdowns for which they have now patched and all seemed well. However over the last few days the PC would randomly restart itself while it is powered off, it would run stable no problems at all and then 5 minutes or so after shutdown it would randomly (on occasion) reboot for no apparent reason.

Yesterday the PC ran fine and I shut it down about 5pm and on shutdown it would reboot instantly every single time and after about 5 attempts I am forced to pull the plug on it.

This is where the issues really start for me, the PC can no longer find the Windows boot files, I try several times an no luck. I check bios and that everything is set correctly to which it is and then reboot again only to find that now I am unable to boot past bios, or even boot in to bios. I get the initial bios screen but then it restarts (despite me pressing he correct key for bios entry) on the bios load screen before the enter bios command even appears.

I have checked all cable and all is well, exchanged memory modules with spare and same issue. I then replaced the PSU and was unable to get any power at all, no fan twitching or motherboard LED light or anything.

So my question now is what could be causing this? I am tempted to say the PSU but am reluctant to replace the PSU if it is still functioning. Could it be the motherboard or the CPU that has died?

Many thanks for your assistance on my issue.

Note: PC is running at stock and has been since built and there is no water leak within the case (the dust would give that away straight away).
 
I did try resetting the CMOS yes.

The alternative PSU is an OCZ 850w, so similar to what I have been running. Will be trying the alternative again tomorrow to make sure I didn't miss a cable or something stupid
 
Could right-click Start button, launch Command Prompt (Admin) and run "sfc /scannow" without the quotation marks. See if that finds anything.

How much free space is available on your boot drive? Win 7 files (around 30GB) are kept for 30 days after Win 10 install, unless deleted.


Nevermind - missed the bit where you say you can no longer get it to start.
 
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Try booting with bare minimum and see what happens. Try with single stick of known good ram, just the boot drive +graphics, and see what happens. Have you carefully checked through your bios settings? I have a hunch this is a memory problem - check your memory settings in bios and set manually to the correct timings.

Let us know how you get on.

Mark
Ps may also try running the board out of the case - just to rule out shorts.
 
Have 2 SSDs. Not a new system as it was running fine before crash.

Unable to load in to bios as restarts prior to that point, get a blue bios load screen and no text/pictures and then reboot before I can enter the bios.

Will swap PSU and ram over and try that now *fingers scrosswe*
 
Ok, update.

I have tested a working PSU and replaced the memory with a known working module.

Unfortunately the problem persists

I am currently resetting bios through battery removal to see if that works, if that fails I am unsure where to progress.

Think this may be an unplanned MB and CPU upgrade
 
Yeah, and even taking it down to very basics of no HDD at all, just Graphics, MB and CPU it won't post all way in to bios.
 
Ahh yeah, RAM was in too, forgot to mention that :p

I didn't try outside the case, but can't see anything that may be causing a short.

So as I'm buying a new MB and CPU any suggestions? Plan to continue using the existing memory and graphics card.
 
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