Solved Pc shuts down after few seconds of starting

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Lowmemory

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When pc powers on, all fans and led lights are running as normal then shuts off after a few seconds then it powers on by itself and shuts off again. It keeps doing this until i turn the power supply off. This happens after i applied new thermal paste on the cpu.
 

Bruce

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Oct 8, 2017
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Yeppoon, QLD, Australia.
any chance the power button is stuck in?
laptop or desktop?

you put all the cables back the way they were?
no lose connectors?
no thermal paste dripping out from the heatsink?
 

Lowmemory

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any chance the power button is stuck in?
laptop or desktop?

you put all the cables back the way they were?
no lose connectors?
no thermal paste dripping out from the heatsink?
Power button looks good, not stuck. I checked everything and all the wires are connected where they should. I also tested it with a working power supply and it still happening so its not the power supply. Does adding too much thermal paste a bad thing? I applied a good pea size amount, not too much and not too little. i used alcohol wipe to cleaned the dusts and also use the wipes to get rid of the old paste.
 

Lowmemory

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The paste covered just enough of the cpu surface, not dripping outside. Maybe i fried my motherboard?
 

Bruce

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if there is no paste oozing out the side, then you used the right amount.
and it was all working fine before the paste was renewed?

in the off chance it is the power button on the case, remove the cable for the PWR SW from the front panel header on the motherboard. once removed, those two pins can be shorted out with a screwdriver (or whatever) to get the PC started.
if it still switches off, it ain't the power button.
and i would pull it all apart, and reassemble on a flat surface somewhere for further testing.
 

Lowmemory

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I can finally see the displays on the screen and got to the windows log in after i removed 2 of the rams out and just having two in (4 total rams) Not sure why it works but if you know why, let me know, thanks.
 

Bruce

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either faulty RAM or more likely they need a clean, both the motherboard slot they go in and their actual circuitry. use a soft bristled brush and wipe both of those areas, reseat the RAM and see how it goes.
 

Lowmemory

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Ok so i cleaned the ram slots with a toothbrush, pc having no issue
either faulty RAM or more likely they need a clean, both the motherboard slot they go in and their actual circuitry. use a soft bristled brush and wipe both of those areas, reseat the RAM and see how it goe

either faulty RAM or more likely they need a clean, both the motherboard slot they go in and their actual circuitry. use a soft bristled brush and wipe both of those areas, reseat the RAM and see how it goes.
I cleaned them slots and when i put 4 rams in those 4 slots, i get a boot loop. If i removed the ram from the first slot, it works . Turned pc off and put the ram from the second slot into the first slot, it works also (rams are in slot 1, 3 and 4) if i put the ram from either slot 3 or 4 into slot 2 while one of the slor is empty, it works (rams in slot 1, 2, 3 or 1, 2, 4) i think it only does the boot loop if i put all 4 in all 4 slots. Not sure whats causing this.
 

Lowmemory

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Now my pc is reading each of my 8gb ram as 2gb and i already tried most of the methods. Jumping jbat1, took battery out, unplugged and turned off power supply and connectors that connects to the power supply. Waited 10 minutes, plugged connectors in, puy battery in, starts pc and still reading as 2gb each.
 

Lowmemory

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Also tried
Now my pc is reading each of my 8gb ram as 2gb and i already tried most of the methods. Jumping jbat1, took battery out, unplugged and turned off power supply and connectors that connects to the power supply. Waited 10 minutes, plugged connectors in, puy battery in, starts pc and still reading as 2gb each.
Also tried going into msconfig, under boot, advance setting. Unchecked max memory and applied, save and restart. Same result.
 

Bruce

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Windows is seeing them as 2GB each, get into the BIOS and see what the motherboard sees them as.

if the boot loop only happens when all 4 chips are in their slots, maybe it's a dual memory channel thing.
your RAM slots are probably coloured, with 1 & 2, and 3 & 4 being the same - or 1 & 3 and 2 & 4 being the same.
only have two sticks in, and put them in the matching colours. it'll only use single channel mode but see how that pans out.
 

Lowmemory

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Ok, i put the 2x 8gb rams in slot 1 and 3 and once i get to the desktop, i checked under performance in taskbar and it shows 1 slot out of 4 is occupied. Checked my system memory, says 2gb. The bios say 2000 mb of physical memories. then i shut off the pc; switched from slot 1 and 3 to 2 and 4. Start it back up, went to bios, physical memory is at 4000 mb. Save and Exit. Went into my desktop window, checked under performance, slot used is now 2 out of 4. Checked my system from system and security, installed ram is 4gb. I just dont get how 8gb stick turns into 2gb, is there a memory leaked or something? I just ordered a new mother board, coming in next week but i want to see what the real issue is.
 

Lowmemory

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Is this considered as 2gb or 8gb? Its what i used.

20210505_213848.jpg
 

Bruce

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Oct 8, 2017
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Yeppoon, QLD, Australia.
and the new mobo takes DDR3 sticks?
and those current sticks are compatible with the new mobo?
memory is pretty cheap at the moment, I'd lash out and get 2 new 8GB sticks as well. (but that's just me)

so despite this memory GB not being what you want - are we past the PC boot looping? (as long as the right stick is in the right slot!)

yes it would be nice to know what the real issue is, but sadly, with hardware, that is seldom possible without actually replacing parts first.

and dumb question - you are sure the PC used to read it as having 16GB's ???
are all the sticks the same make/model/capacity?
 

Lowmemory

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Never really pay attention to the rams, i just assumed they are 8gb stick. Yea i figured out why my pc get the boot loop. The new motherboard is same maker just newer version. Bought 2x 8gb sticks now, hopefully they are 8gb, not 2gb. Guess you can close the thread now, thanks for helping, appreciated.
 
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