New computer does not start

[vdorta]

New DIY, Antec P180 Mini, Asus M4A785TD-M EVO, I have built several computers before. Power button does nothing when pushed. Mobo's onboard LED blinks when Power Supply is ON and I have tried the Antec Power Switch cable leads on both positions on the motherboard system panel connector. I guess there is a problem with the Antec's power button cabling. Any help would be appreciated.

 

[sivart]

Have you tried to start it by creating a connection between the two power pins on the motherboard (I.e. with a screw driver)? That would help eliminate a power button issue.

 

[vdorta]

Thanks. I tried the screwdriver trick and it still doesn't start. I also tried it together with the mobo jumper. Nothing happens. Any other idea regarding the motherboard?

 

[nboy22]

Try PSU in different computer, or bring new PSU into this build and try it.

It sounds like something might be wrong with the motherboard to me. You may also be able to try rewiring the power button to be the reset button, but if you already tried bridging the two pins I would imagine it would've started up by now.

 

[vdorta]

I agree with your analysis and I will RMA the mobo. I don't have another PSU to try; the one I am using (SeaSonic 430) was taken directly from another computer.

 

[vdorta]

Wait a second. The two Antec TriCool case fans are connected directly to the PS, so they should start spinning up with the PS switch, right? They don't move at all, so the power supply is the problem.

 

[nboy22]

Wait a second. The two Antec TriCool case fans are connected directly to the PS, so they should start spinning up with the PS switch, right? They don't move at all, so the power supply is the problem.

Actually, it could be either at this point. You might not have enough power, or the PSU might just be dead, or the leads that connect those two pins to the PSU could be bad on the motherboard. If the PSU worked in the other build and you feel the wattage should be enough for this PC, I would still RMA the motherboard.

 

[vdorta]

I uninstalled the PS and tried it by itself but it's dead. I already ordered a new PS, as I would prefer not to disconnect everything from the mobo if I can. By the way, I got one of the last Scythe Ninja Minis which is AM2 but installs perfectly on the AM3 socket. Will report back.

Thanks for all the help,

Vladimir

 

[pcgeek11]

Firstly will the PC start up ok in safe mode ? (hit F8 when powering up) If yes can you do a system restore to a time you know the PC workied ok ?
Next in IE settings.. Tools, internet options, Connections, Lan settings, is there a tick in Proxy settings ? take it out, and retry ur PC startup. However, If you can download Virus scanners you should be on-line, so shouldn't get any "proxy" error messages? Also Check automaticall detect settings is ticked
If you can get on line Download SuperAntiVirus, and CCleaner, allow to download, then install, the run Each in turn.

What ????

This is not applicable. The PC will not start, No Power ...

 

[krnmastersgt]

Errr no to the above comment on the case fans starting up when you turn on the PSU, they'll power up with the rest of the system, or they won't power up at all unless you've heavily modified something on your own so that the PSU is constantly outputting power to all its lines.

From what you've described, it sounds like the PSU is perfectly fine and that you're getting the pins incorrect. Either check back to your manual, contact Asus about it and see what they'll tell you, or just experiment like I would. Eventually you'll stumble upon the correct pin configuration!

And sometimes the boards are rather stupid since one I recently worked on had color coded pins that had no correlation to the configuration which led me to ask what the hell they were there for.

 

[tweakboy]

Seems like a PSU issue, something is blown possibly. Did you smell anything ? anyhow gl

 

[vdorta]

I don't think the pins are the culprits, I tried every possible position, including the reset switch pins. A new PSU will be here tomorrow, so I'll report back.

 

[killster1]

how did you test teh psu by it self connecting the green and black pin with paperclip? i have a psu tester but before that i would test with paperclip you should prob google it first tho to be sure it still works with green and black like it did hehe, SOme motherboards are picky about psu's

 

[vdorta]

Thanks, as I still have the old PSU I will try this trick later.

 

[vdorta]

OK, this morning before going to work I tried the paper clip test. The PSU came ON, its fan working OK; I connected the two case fans and they worked OK too! From the previous screwdriver test, the power and reset switches did not work. Isn't the motherboard the problem then?

 

[nboy22]

If the PSU comes on and spins up, then that was at least part of the problem because you are one step further now.

Are you saying that you do not see the screen on the computer posting anything? It just remains black? check all cabling to video card and such. Check monitor cable, and make sure the monitor is set to the right input. Do you hear any beep codes coming from the motherboard? If not it may be functioning fine, it may be that the motherboard doesn't have a built in speaker, or it has a LED code. If it doesn't have a built in speaker you might want to head to a computer shop and just pick on up.

I'm having some trouble understanding if you're touching two pins on one of the cords from the PSU itself, or if you're touching the two pins together from the motherboard.

 

[vdorta]

nboy22, I haven't gotten to checking post or anything yet because the computer never started. I disconnected the PSU and tested it by itself. Regarding the power and reset pins, I tested both of them with a screwdriver and nothing happened. I now believe the motherboard is the culprit but I will connect the new PSU tomorrow morning just to make sure. If it doesn't power up the computer, then I will RMA both the new PSU and the motherboard (I should have followed your first suggestion).

 

[nboy22]

Yeah, definitely try the new PSU in the computer, hook it up to the power button and see if it works. If it doesn't, you can bet the culprit is going to be the leads on the motherboard that connect the PSU to the two pins. In that case you would want to RMA the motherboard for sure.

 

[vdorta]

I did just that and still nothing happens. I will RMA the motherboard.

Thanks to everybody for your help.

 

[vdorta]

I am glad to report that the new motherboard works perfectly. Athlon II X4 630 2.8MHz OC'd to 3.46MHz, normal voltage and fanless! Thanks to Scythe Ninja Mini, Antec P-180 Mini's two big exhaust fans and Cool 'n' Quiet, idling temps stay in the mid-30 C, mid-40 C under load.