I suspect my motherboard has failed

[ace1412]

I have an MSI H61MU E35 B3 mobo i bought early 2011. It was working fine till a few days ago when i tried to turn it on but it shut down by itself. The hsf still powers on. Sometimes it'll last long enough to hear 1 short post beep then after that shuts down after a few seconds. Other times it wont even last long enough to hear the post beep. Then everytime it shuts down it always tries to restart itself but the same symptoms show up.

What i have tried doing:
Changed psu, same thing
Take out my gfx and network card, same thing
Test 1 stick of ram at a time in different slots, same thing
Boot with no ram, 3 long beeps then shut down and restart with the same symptoms
Take it out of the case and placed on a cardboard box, same thing

Faulty mobo or something something else? Cpu maybe?
Halp!

[ace1412]

Whoops forgot to list my components.
Cpu: intel i3 2100 with stock hsf
Ram: kingston 2x2gb ddr3 1333mhz
Gfx: gigabyte nvidia gt630 1gb
Network card: dlink dwa-547 n650
Hdd: wd black 320gb
Psu: antec earthwatts 500w

Above components have been working fine before this issue came up.

[supermint]

I had the same problem of being unable to boot up fully. Pc just reboot itself continuously. I drilled down the problem to my rams. Had to clean the ram contacts and reinstall it in. Works well after that for me.

[ace1412]

Well my mobo turns itself on and off even without the ram sticks so i suspect it's something else. Is it supposed to do this? I have very little experience troubleshooting hardware.

[supermint]

ur mobo cannot boot up without ram sticks. why not u try borrowing a ram stick from someone and try on ur mobo.

[ace1412]

Will do.
What i mean without ram sticks is that the hsf will spin up then I'll hear 3 long post beeps (memory error?) then spin down. But sometimes I'll hear only 1 or 2 long beeps and the hsf will already spin down.
Will get back when i try with new ram

[clon22]

The board will not boot without any ram btw.
(As what supermint mentioned.)
Also when you mentioned that you heard the beep sound,
was it similar to when you removed the rams?
If so, try to get a spare ram to test with your board.
Remember to do a clear CMOS prior to that.

[clon22]

But if it still gives problem,
just bring the board down to our service center.
Just checked that we have stocks.
If its faulty, we'll change for you.