Custom built PC acting strangely

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stevan6

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Aug 13, 2011
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Hello all,

So here is my situation. I have a custom pc that I built back in 2011, with upgrades to the video card and ram in 2013. I kept PC in my basement (it's unfinished, but it was sitting on a carpet) for the months of april through august. Everything was working fine, then I went on vacation from June 10th to August 25th, with the pc being unused the entire time. When I got back, the pc would turn on, then turn off after getting to the login screen of windows 8.1. It kept happening after turning off the pc and plugging it back in. Sometimes i'd get into windows, but it would shut off after a couple minutes. I assumed straight away it was a power supply issue, but here's the weird part. I ended up managing to wipe my system and install windows 10, and now it shuts down after maybe an hour or so, but the system is noticeably slower. However, when the PC is sitting on its side (not standing up), it works as it normally should, with some decreased game performance. Is it just me, or is that really strange?

Any help would be appreciated. If specs are needed I will supply them
 
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stevan6

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Processor: Intel Core i5-2400 Sandy Bridge Quad-Core 3.1GHz (3.4GHz Turbo Boost)

Motherboard: BIOSTAR TH67B LGA 1155 Intel H67 HDMI SATA 6Gb/s Micro ATX Intel Motherboard

HDD: Seagate Barracuda ST31000524AS 1TB 7200 RPM AND Crucial 120gb SSD (for OS)

Graphics: Custom NVIDIA GeForce GTX 660ti

RAM: 12GB (2x4gb and 2x2gb)

Case: Rosewill CHALLENGER - Black Gaming ATX Mid Tower Computer Case

And this is the PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817171039
 
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stevan6

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Ok So I picked up a new PSU just to see if it fixed the issue, unfortunately it did not. However, I realized when swapping PSU's that my SSD may be the issue. I have 2 hard drives, one SSD and one regular HDD. when plugging in the SATA cables, I noticed the cable doesn't "click" on the ssd, but it does on the HDD. Could the port on the ssd be damaged? When I think about it, it kinda makes sense. When the PC is on its side, gravity keeps the cable down, so the PC runs normally. But when I stand it up, maybe the cable is getting loose, then it shuts off? Just a speculation
 
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stevan6

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I did notice when swapping out the PSU that the cpu cooler was a bit loose. But I tightened it and it's fixed now, still no luck. Even worse now, the PC is slow and shuts down on its own even when it's on its side now.... I don't know what happened
 
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stevan6

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I unplugged the Graphics card last night, didn't help unfortunately. But here are the results of the monitors, you can see the 3 screenshots here

http://imgur.com/a/byZut

 
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laviniuc

laviniuc

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if you have thermal paste around, take the cooler down, clean the cpu/cooler of the old paste, reapply and reseat the cooler. looks like the cpu overheats.

also clean the cooler fins of dust, the fans with some compressed air or vacuum cleaner after you took it out.
 
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stevan6

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Just to be clear, the thermal paste is the grey substance on the bottom of the cooler and on the top of the chip, correct? Any specific way of removing it before reapplying?
 
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stevan6

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Thank you so much for the help, i'll give it a try tomorrow and post back. So i'm reapplying it on just the cooler? Or both the cooler and the chip

 
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laviniuc

laviniuc

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-you detach the cooler/bracket
-you clean them both (no need to get the cpu out of the socket if you're not confident)
-you clean as much dust as you can from the cooler/fans/heatspreader - easier with it outside the pc
-add the paste on the cpu
-reattach the cooler (avoid lifting it back after you first press it down on the cpu)

you're confused because the standard cooler had the paste applied on it instead of the cpu. this is because the cpu can be sold also separately without a cooler so it's more convenient for intel to add paste on the cooler. the end result is the same but when you add it on the cpu you can put the pea sized new paste on the center of the cpu. if you add it on the heatsink it can all drop before you press it down.

when intel adds it on the heatsink they use professional equipment that adds a thin film of exactly the same height across the whole area where the cpu will be. no worries, adding it on the cpu and pressing downwards in one firm movement does exactly the same.
 
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BobRoberts123

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Your hdd might be damaged (but i doubt it ) .
Try flashing the bios of your motherboard and reinstall windows .
If that doesnt work its probably hardware related , so try applying new thermal paste to your cpu and check your cpu and gpu cooler for dust .
Your system might have been exposed to heat which could've damaged it .
It sound like something on one of your components was damaged by a broken mosfet / capacitor etc or something might of short circuited .
 
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