PC Startup failure

[Bird87_ZA]

My SO's PC just fails to start up. You hit the power button, and the fans spin up for a second then it shuts down. 3 seconds later, it tries to start up again, shuts down after 1 second. Keeps doing this until you switch off the PSU.

I've replaced the PSU, I've taken out the GFX card, I've taken the pc apart and put it back together. Keeps doing this. Last ran fine about a year ago when we played ARK together.

Any ideas on what the issue may be and how I can test?

 

[Valdo8]

Did you try turn it on outside of the case?

 

[AceSwiftShooter]

Ram. Take out. Put back. Try again.
Or
Remove cmos battery for a minute and put back.

Sent from my SM-G930F using Tapatalk

 

[Sola Scriptura]

last time this happened to me my mobo died. could just be a short somewhere.

 

[Spaffy]

Try different RAM?

 

[blankster]

Had this myself, for 2 issues:
1) bad psu/sata cable/port . fully disconnect all drives, if it posts, then connect/reboot one at time. 2) bad cpu. But this usually results in a post code error

 

[Bird87_ZA]

Thanks. Will try all the above tonight

 

[souljazk]

Remove RAM, turn it on, does it beep? If yes - good, put RAM back in after shutting it down. If no, check if you have the small diagnostic speaker plugged in.

A little trick Iv found to bring back many systems:

!) Remove CPU and RAM.
2)Turn power back on, and try turn pc on. wait 1 min.
3)Turn off and flush power for 20seconds.
4_Put RAM back and see if it beeps.

 

[Sout13]

Did you fix the problem?
If your mobo has a cmos jumper you need to move it when you remove the cmos bat otherwise theres still power in the board.

 

[Bird87_ZA]

For a long time we didn't use the PC as we were busy moving. Over december I decided to take it to the office because there's a bunch of people that could help me. Switched the PC on at the office, it booted into windows, no issues.

Then, about 5 days ago, her Windows started giving issues (after we've used it about 20 times for Dota and the likes), so I decided to reload Windows. Fresh copy and it worked fine for the rest of the day (this was about 2 days ago). We played dota for probably around two hours, no issues. Switched the PC off. Today when I switched it on to play some more Dota, it went back into the bootloop thing. This is what happens:

So I tried all the suggestions above, and none of them work. @kenny'sgh05t suggested I reseat the CPU, which I did, also didn't help.

I'm starting to suspect the motherboard, but I don't have a Mini ITX board lying around. It's an MSI B75IA-E33.

 

[Bird87_ZA]

I've now taken everything off the motherboard and moved it out of the case, and switched it on (with a screwdriver) and still does the same. So pretty sure mobo is dead.

 

[Bird87_ZA]

Swapped out CPU's (put my CPU on her mobo with nothing else plugged in) and it still does the above. So thinking it must be Motherboard. Thoughts?

 

[Apoc79]

Stupid question but you defaulted the bios already right?
Bios updated to latest version?
while you are at it, try her cpu with your ram, just to rule that out as well and if at all possible different psu.

 

[Bird87_ZA]

Yes bios was defaulted.
Don't know, as I can't access the BIOS, but highly doubt it.
Will try her CPU in my PC.
Already replaced PSU (was huntkey, now corsair)