CPU/Mobo PC not booting , no display, no bios (disconnected everything)

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maldi911

Apprentice
Configuration:

1. tagan TG500 U37 smps
2. asus m4a785td-v evo motherboard
3. amd 550BE cpu
4. 2X1GB corsair xms3 + 2*2gb gskill ripjaws
5. palit ati 4670 (retired for 2 months)

Here's my situation.
As of this moment, my pc will not boot with any display or beeps ( afaik there is no motherboard speaker attached here).
Also as far as i can see, theres no visible damage to any components.
The graphics card was retired 2 months back ( more on this later , and is not involved in this)

I've disconnected all peripherals (hdd, dvd writer , extra fan to keep hdd's cool) .
I've also removed all the ram chips.
I've removed the bios battery.

On powering up, either 1 of 2 things happen:
1. the cpu/smps fan spin up, mobo led lights up (also does ethernet led) , but pc immediately powers down in 5 seconds, OR
2. more often than not, everything spins up , lights up and stays like that (i've counted a few minuts after which i power down holding power key for 5 minutes).

The same 2 scenarios occured when i hadall the peripherals and ram chips inserted as well. No difference.
I dont have a spare smps to connect and check nor do I know how to use a multimeter properly acc to specs.

A bit of history:
2 months or so back, exact same thing had happened a couple of times on and off. PC wouldnt boot for a couple of times, and then suddenly it would work fine for days. ( It would boot without bios screen or display)
Finally one day it just didnt boot, I took it apart piece by piece, checked it over, cleaned everything (incl cpu and sink) , and reseated everything properly. It was after this I discovered my pc was working fine on onboard but not on my graphics card. So I removed it and kept it hoping to RMA it.
And now this has happened again, but I dont have the graphics card to blame this time.
Also, on and off the smps seemed as if it couldnt power my system ( there are 3 sata power cables on 1 cable out from the smps and it could power only 2 disks properly, I had to power the 3rd disk with the cable for dvd writer.

I guess from my symptoms, smps and mobo seem the most likely of culprits.

I've scourged the internet including the 2 threads on this forum with people seemingly having exact same issues as me.
Please give me proper pointers.

Oh and also, going to lami is a real pain for me ( crazy work requirements) , so I can probably do this very few times.

Does anyone know the exact contact addresses for RMA of
1. Tagan SMPS (<2 years old)
2. Asus Motherboard (<2 years old)
3. AMD cpu (< 2 years old)
4. palit graphics card ( its over 2 years old, dont know if its warranty covered or not)
5. Microsoft keyboard ( < 2 years old)
 
2 months back your mobo gave you an indication of dying. And now its in serious state. I dont think your psu is at stake here. You can try all your components on your friends machine. I m sure your mobo is the culprit here. Send it for rma.
 
First try connecting a speaker to the mobo, you might have received one with the cabby, but form the situation it seems like the mobo is faulty.
 
First connect the case speaker,and then post back the beeps.

--- Updated Post - Automerged ---

PS:-Did you face any BSoD before this tragedy happened?
 
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