Need Help: Self-assembled PC not booting up.

[vaibhavyagnik]

Guys, is there some way I can find out if the problem is with the processor, and not the board?

If you have eliminated the power supply, the cabinet power switch and reset switch then there is a fair bit of chance that the processor is dead because power led on motherboard is glowing. Would help if you could find a similar socket 1155 processor and tried to boot it off the same motherboard.

 

[sam9s]

Guys, is there some way I can find out if the problem is with the processor, and not the board?

I am pretty sure its neither, first try what I suggested then we will move ahead ......

 

[Thad E Ginathom]

Follow Sam9's instructions exactly.

I can smell an experienced troubleshooter!

 

[sam9s]

^^ ,,,lolzz you are making me conscious Thad... ....

 

[quad]

Edit: noticed that Vaibhav has already posted how to test SMPS. The pics may be useful.

1) You can test the SMPS separately. Disconnect all SMPS outputs.
See the images below - short green and black wires with a small
jumper (be careful...crosscheck 5 times before turning on the power).
The SMPS should come on when you apply the power. Check
the voltages with a multimeter.

2) Is your Processor oriented correctly and seated fully
and correctly in the socket?

 

[BalaHiFi]

I guess the small connector which is connected to MB to turn on the board is connected wrongly, mostly it will be having PWR word in the cable and also in the board,check that and see its correctly connect + and - should match to enable the power supply from SMPS to MB, the green led will glow with cmos battery too.

 

[hydra]

before I pore in my suggestions .......

1. Disconnect every single connection form MOBO... even RAM
2. Pull out the mobo from the case ..... and put it on the bed/table ....(IMP .make sure its unscrewed and lying naked on bed ....without any connections or RAM)
3. Just connect the 24 PIN ATX power connector on mobo AND
4. 8 pin ATX connector on mobo
5. lastly connect CPU fan on mobo

(Assuming that your CPU and its fan are still fitted to the board)

Now look at this diagram .... that is where you are connecting the power button wire ...... make sure you are connecting this correctly. the connections are going Horizontally not vertically .....(IMP)

DO you see POWER and GROUND (Horizontal not vertical) in the diagram, when all the 3 connections are connected just short these two pins (power and ground) with a coin or a key. Again (Horizontal not vertical)

Your CPU fan should start .

Power off the machine (by switching off the PSU or plug out the mains....either way)

Now connect the display via VGA, not changing anything, power on the sys, again shorting the pins

The cpu fan should start and you should see something on the display ....... its irrelevant ATM what do you see. If you get the display, thats all
we want right now ....

If this succeed we shall proceed further ...

Sorry for taking so long to get back.

@sam9s, I followed your steps exactly and I tried this, but it did not work: In the sense that the CPU fan did not start. The board behaved exactly as before - the green power LED on the board lights up, but nothing else works.

I guess the exercise might not have been a total failure, as perhaps the result of the exercise might be giving an indication as to where the problem lies?

 

[hydra]

Edit: noticed that Vaibhav has already posted how to test SMPS. The pics may be useful.

1) You can test the SMPS separately. Disconnect all SMPS outputs.
See the images below - short green and black wires with a small
jumper (be careful...crosscheck 5 times before turning on the power).
The SMPS should come on when you apply the power. Check
the voltages with a multimeter.

2) Is your Processor oriented correctly and seated fully
and correctly in the socket?

Thanks for the pictures!

1) I did not try this as I'm somewhat colour blind and I'd have trouble identifying the exact colours/sockets. I don't want to fry anything. However, I checked the SMPS with my other machine, and it works properly.

2) Yes. I made sure of this when I installed it: The two tabs on the top aligned with the tabs in the socket, and the arrowhead sign on the processor was pointing to the bottom left. I double-checked it later after the initial setting-up did not work.

I guess the small connector which is connected to MB to turn on the board is connected wrongly, mostly it will be having PWR word in the cable and also in the board,check that and see its correctly connect + and - should match to enable the power supply from SMPS to MB, the green led will glow with cmos battery too.

I checked this too. The connector was connected properly. I'd also checked and redone all the connections twice, after the setup did not work initially.

 

[unicorn]

May be as a last try you should check all the jumpers and see if they are shorted properly

 

[sam9s]

@sam9s, I followed your steps exactly and I tried this, but it did not work: In the sense that the CPU fan did not start. The board behaved exactly as before - the green power LED on the board lights up, but nothing else works.

Is the 8 pin connector connected to the board, coz thats what gives power to the CPU, and also is the CPU fan connected to the mobo....????

'Also I think you have an extra PSU right try the same steps with that extra PSU as well

If the ANS to all questions is yes, i.e 8 pin is connected and cpu fan is connected ... still the fan isnt staring. Connect the display (via VGA) and see if anything appears on the screen.

 

[hydra]

Is the 8 pin connector connected to the board, coz thats what gives power to the CPU, and also is the CPU fan connected to the mobo....????

'Also I think you have an extra PSU right try the same steps with that extra PSU as well

If the ANS to all questions is yes, i.e 8 pin is connected and cpu fan is connected ... still the fan isnt staring. Connect the display (via VGA) and see if anything appears on the screen.

Yes, the 8-pin connector was connected. The CPU Fan was also connected to the motherboard.

I'll try it out now with the other PSU.

 

[sam9s]

^^ and you dont get anything on the display as well ...... with the older PSU

 

[hydra]

Tried it out with the other PSU.

Same result: Nothing happens. The CPU Fan doesn't even twitch, and there's nothing on the display

 

[shredder]

Have you tried installing the processor from the older CPU on your new motherboard and vice versa? (assuming they are same socket type). What about RAM? These things are often the cause of much problems. Try again with only one RAM stick and see if anything happens.
It is very rarely the case that a processor comes defective out-of-the-box, unless it has been mishandled.

 

[sam9s]

^^^^ mmm this seems to be bad .... can you click a snap of what all you have connected ...a good clear snap of your mobo.

 

[hydra]

^^ The old machine has a Core2Duo processor. The sockets won't match.

I tried all possible combinations of RAM. One stick only (with both sticks individually), each stick in a different socket etc. I'm pretty sure the problem is not with the RAM.

 

[sam9s]

Have you tried installing the processor from the older CPU on your new motherboard and vice versa? (assuming they are same socket type). What about RAM? These things are often the cause of much problems. Try again with only one RAM stick and see if anything happens.
It is very rarely the case that a processor comes defective out-of-the-box, unless it has been mishandled.

shredder, with what he is trying that I have told him, there is nothing on the board, no RAM, no connections, only 24 pin, (mobo power) 8 pin (cpu power) and CPU fan .... and still no response ....

 

[sam9s]

^^ The old machine has a Core2Duo processor. The sockets won't match.

I tried all possible combinations of RAM. One stick only (with both sticks individually), each stick in a different socket etc. I'm pretty sure the problem is not with the RAM.

I hope you tried without any sticks as well ... like I told you ... you would not get anything on display with no RAM but CPU fan should respond.

get me the snap of what n how is connected , can you.... possible...???

 

[doors666]

sometimes the mobo is screwed too tight, making the connections on the bottom of mobo touch the cabinet bottom, which is grounded. when that happens, nothing will work. try to loosen or unscrew the mobo and see what happens.

 

[sam9s]

^^ Pleasezzzzzz read the thread before a suggestion, I already suspected this, and made him pull out the board and put it on bed or table and then do the testing ....