PC Boot Loop/No Post, Multiple Components Switched

rv900

rv900

rv900

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4 Apr 2018
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Hi, new user here looking to see if I can get any opinions on an ongoing problem I am having with my PC build. As the title suggests when I power on the PC all fans spin for 1 second then PSU clicks and powers off only to repeat again 1 second later.

Originally had this problem with the following, where the system worked for about 1 month before failing to post anymore:

i5-4460
Asus B85M-G
Corsair AX760i PSU
Corsair DDR3 ram 2x4gb
Samsung 850 EVO SSD

After this I did troubleshooting with 3 PSU's, 2 more ram sticks and another intel lga1150 cpu and still couldn't get a post so ended up buying a new mobo (gigabyte GA-H81M-S2V).

With this mobo the system worked for a few days before the problem resurfaced. I also switched the SSD and still no luck but no longer have access to spare ram/cpu/psu to test with.

My question would be where do I look next as its exactly the same issue as before and changing ram/cpu/psu did not get a post with the previous mobo so I'm hesitant to blame one of those this time, but also mobo seems v.unlikely as I have actually now tried 3 mobos whilst testing this problem. Have also been told that a cpu failure in this case is unlikely.

As a heads up am testing this outside the case with only cpu and ram (each stick 1 at a time or together in each slot) and 4 pin cpu/24 pin power connected and cannot get past boot loop. Have also cleared cmos and am powering via touching pins.
 
Have you tried new BIOS/RTC battery?
Platform is such old that even in that new motherboard battery could be bad.
While it would be unlikely to cause such problem that's at least cheap shot.
 
Plug in as few components as you can to test. It does sound like a RAM issue. Sometimes RAM will work with one machine, but not the next. I've even seen machines that are fussy about which stick is in which slot, just swapping the sticks about was enough to fix the issue permanently.

I'd download memtest and run it against one stick at a time.
 
rv900 said:
Hi, new user here looking to see if I can get any opinions on an ongoing problem I am having with my PC build. As the title suggests when I power on the PC all fans spin for 1 second then PSU clicks and powers off only to repeat again 1 second later.

Originally had this problem with the following, where the system worked for about 1 month before failing to post anymore:

i5-4460
Asus B85M-G
Corsair AX760i PSU
Corsair DDR3 ram 2x4gb
Samsung 850 EVO SSD

After this I did troubleshooting with 3 PSU's, 2 more ram sticks and another intel lga1150 cpu and still couldn't get a post so ended up buying a new mobo (gigabyte GA-H81M-S2V).

With this mobo the system worked for a few days before the problem resurfaced. I also switched the SSD and still no luck but no longer have access to spare ram/cpu/psu to test with.

My question would be where do I look next as its exactly the same issue as before and changing ram/cpu/psu did not get a post with the previous mobo so I'm hesitant to blame one of those this time, but also mobo seems v.unlikely as I have actually now tried 3 mobos whilst testing this problem. Have also been told that a cpu failure in this case is unlikely.

As a heads up am testing this outside the case with only cpu and ram (each stick 1 at a time or together in each slot) and 4 pin cpu/24 pin power connected and cannot get past boot loop. Have also cleared cmos and am powering via touching pins.
Click to expand...

If we look at this logically:
Did you use the Corsair AX760i PSU on the new Gigabyte GA-H81M-S2V?
If so it would suggest that the PSU is the problem, it fired your Asus B85M-G, you then tried 3 other PSU's, ram and CPU before buying the new MB,
So if you used the Corsair PSU on the new MB then the Corsair PSU is surely the problem

(assuming I have interpreted your post properly)
 
You can get a PSU tester that plugs in and says if your PSU is behaving under spec.

It may not behave under load, though - but should past POST.

The difficulty with swapping parts is - you don't know which are damaged and which you have damaged from connecting them to malfunctioning parts.
 
groovesection said:
If we look at this logically:
Did you use the Corsair AX760i PSU on the new Gigabyte GA-H81M-S2V?
If so it would suggest that the PSU is the problem, it fired your Asus B85M-G, you then tried 3 other PSU's, ram and CPU before buying the new MB,
So if you used the Corsair PSU on the new MB then the Corsair PSU is surely the problem

(assuming I have interpreted your post properly)
Click to expand...

Quite possibly assuming the mobo has actually been fried on both occasions (don't know if it's possible to test this).

Habakkuk said:
You can get a PSU tester that plugs in and says if your PSU is behaving under spec.
Click to expand...

I'll give this a shot, however will it be any different to the test button on the unit (which shows no sign of malfunction)?

Am very close to giving up and buying new psu/mobo/cpu/ram. Is obviously a good time to upgrade but all I need it to do is web browse :(.
 
rv900 said:
I'll give this a shot, however will it be any different to the test button on the unit (which shows no sign of malfunction)?
Click to expand...
Get multimeter instead.
There's no guarantee of accuracy of those cheap PSU "testers" and most importantly they don't create any real load.
(neither can they tell anything about ripple)
Multimeter can be used also for other things.
 
I'd take a cheap PSU tester over a cheap/free multimeter.

Cheap multimeters don't have rupture fuses, nor CAT III rating for the leads so are not safe for using on mains power.
 
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