PC boot loop and then eventually boots up

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Hi guys,


A long post coming up so please bear with me.


I built my current system back in 2014 (specs in sig) and had no problems until the November of 2016. Before that I had overclocked my cpu to 4.6ghz, along with ram and gpu and had it on pretty much 10-15 hours a day that included sessions of gaming and occasional benchmarks to check for any abnormalities in temperatures or overheating issues. From memory, i cannot recall my cpu under 100% synthetic load exceeding 80 degrees C and the pc never locked up in any games i ever played.


All this changed in November 2016. Whenever i started the pc from a cold boot, the fans would spin and the pc will boot loop 3-4 times (no post to bios) before booting up and then it would function normally. I did not pay much attention and thought that it may be the motherboard doing its thing (like some are known to do).


Then in December 2016 the boot loop time went from 2-3 minutes to 20-30 minutes and then to 2-3 hours and then over 10 hours near the end of the year. At each point though the pc would eventually start up and have no issues whatsoever. The overclock was still working fine, temps ok, no crashes during gaming or benchmarks and I just could not get my head around this problem except that I dreaded restarting it because I knew the cycle will start again.


Now here I am 4 months in and the problem is still there. Boot loops every 2-3 seconds of powering up, does not post and it could go on for some minutes or hours and then it starts working as normal again.


The steps I have taken to resolve the issue:


1.Cleaned everything as much as I could.

2. Restored factory defaults on everything so no overclocking on any component since December 2016.

3. Tested each component on its own by removing everything else.

4.Memory tested multiple times through memtest and it comes out fine.

5. Breadboarded the setup to see if the problem is somewhere in the case.

6. Re-connected all the wires by removing psu.

7. Removed GPU and ran intel HD onboard graphics.

8. Removed hard drive one by one.


I am sure I am missing one or two more things I have done but you get the gist.


Last week, I decided to have it looked at by a “professional” at a shop and after 3 days and £25 later I was told that my cpu is dead and/or ¾ cores are not working. I was just lost for words at that point especially after telling them beforehand that all benchmarks I have carried out that include multicore stress checked out. Also, they said they took my CPU out and tested on another motherboard but I find it hard to believe since the pc looked fairly untouched.


I am bit strapped for cash currently so cannot really afford another “professional repair” (most are cons anyway) and spend on parts when I do not know where the problem is. Sadly, I do not know of anybody who would let me check some of my parts like cpu or psu.


I do not think it’s a software issue since the boot loop happens like within 2-3 seconds. I doubt hard drive even gets started at that point but I could be wrong.


What do you guys think? Anybody else ever had a similar problem.
 
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Thanks for your input.

They told me that they took the cpu out and put it in another 1150 socket motherboard and it boot looped the same way. I guess I may be a bit sceptical about them doing that but I suppose i can take their word for it. I tried the jumper clip setting with the psu to jump start it without pressing the on/off pc button and it did the same. The pc repair person also used a volt meter to check the psu and said it was ok.

The bios was updated to the latest version as soon as it was released.

If you think that this may be a damaged CPU, what else can i do to confirm that? I have tested using the routine benchmarks and I do not see issues with the cores at all. Perhaps I missing something, something that would confirm that it is indeed a damaged processor. I am sure you can understand my hesitance in accepting the notion of a damaged cpu because when the pc runs, it runs without any issues.
 
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Another thing i forgot to mention is that boot loop ranges from anywhere between less than 5 minutes to a few hours sometimes before the pc boots up. It is so inconsistent that I cannot even predict a pattern. Right now the pc is on since last night for about 15 hours. Did some gaming (i miss it a lot) and currently its just idling. Temperature during gaming were 40-50C, idling between 28-34 on all cores.
 
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I guess my gut feeling tells me that its either a shoddy power cable somewhere that is causing a short or the psu is failing or at least I want to believe that this is the case. I cannot test the cpu on another motherboard so i guess the only logical step for me to do is to just get as much use out of it as i possibly can before either the pc completely fails or a new symptom appears or when I have the financial means to probably upgrade the entire rig. Until then, however, its going to be a difficult period for me - not only because i will never know when the pc will boot after a restart but also due to not knowing where the actual problem is.

Rebooting puts the pc back into a boot loop so any sort of auto-restart due to software update overnight is annoying to say the least.
 
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Sadly no, I have just moved to a new place and i do not know anybody locally and most of my friends and family are very basic users of pc and do not have the necessary components.

The memory was running at fairly tight timings and high voltages when the system was overclocked last year. When i restored the defaults, the memory voltage and timings were very slack i feel but I will give it a go again the next time the pc is restarts and I am actually physically present to boot in to bios which I am not because the pc never starts at any particular time point. I just leave it and hope that when i get back home or have free time that its up and running. No harm in trying though.
 
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Still have not rebooted the pc since 2 days now. Was working fine when i was gaming last night. Perplexing to say the least. Lets what happens next...
 
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