[RESOLVED] My pc powers up as soon as i conect to wall?

[LIPS2K1]

hI some time ago my old psu failed it was a ATX type unit so i replaced it but now i dont have to press the power button on my tower to turn it on as when i plug into the mains it comes on by its self can anyone help me?

[Sowulo]

Look in your BIOS for Pwron After PWR-Fail and disable it. That should get you where you want.

[Ruslan]

Originally posted by Adam Lips:
hI some time ago my old psu failed it was a ATX type unit so i replaced it but now i dont have to press the power button on my tower to turn it on as when i plug into the mains it comes on by its self can anyone help me?

Unfortunatly, it may be also either fried on-board PWM switch mode regulator IC(HIP6004a or similar -it's depends on MoBo model)or bad Power Supply unit(PSU)(yes, even new one! - if PSU has problems with standby mode).
First case I've seen many times after PSU failures and can be fixed only by resoldering that IC.I did it many times...
Second case might be checked. Disconnect PSU
connector from MoBo, and connect power cord to PSU. If PSU started even being disconnected from MoBo - that power supply has fried standby module. This module is responsible for power on of system and using
"low level" (zero) signal from MoBo (from mentioned above IC).

[condor]

Ruslan, as always, gives the educated and technically sound explaination..

I, on the other hand, will try something different first (before re-soldering a mobo )

disconnect the cable from your Power switch to the motherboard - it might be shorted ...

seen that before..

[Sowulo]

Originally posted by Sowulo:
Look in your BIOS for Pwron After PWR-Fail and disable it. That should get you where you want.

Ok. Since two of my very respected peers here seem to think my solution doesn't apply here. I run into this almost daily. In the BIOS setting for power on after power failure, setting this option to on means that after any abnormal shutdown (which for many systems means any shutdown that doesn't include flipping off the switch on the power supply as well as shutting down from Windows or holding down the front on/off switch for 4 seconds before unplugging the computer) the system will restart automatically as soon as power is restored (plugging in the power cord).

This is the easy first thing to check. If this doesn't solve your problem, then by all means follow Ruslan's advice he has far more expertise than I do with the technical aspects of the electronics and a soldering iron.

[Ruslan]

Originally posted by condor:
I, on the other hand, will try something different first (before re-soldering a mobo )


Agreed! Especially if MoBo is covered by
warrantee.


disconnect the cable from your Power switch to the motherboard - it might be shorted ...

seen that before..

I've seen it also...

You can check Sowulo's suggestion - reset to default or simply change BIOS settings and see, may be it help You to solve Your problem. Resoldering is always last option. Good luck!

[condor]

Originally posted by Sowulo:
Ok. Since two of my very respected peers here seem to think my solution doesn't apply here. I run into this almost daily. In the BIOS setting for power on after power failure, setting this option to on means that after any abnormal shutdown (which for many systems means any shutdown that doesn't include flipping off the switch on the power supply as well as shutting down from Windows or holding down the front on/off switch for 4 seconds before unplugging the computer) the system will restart automatically as soon as power is restored (plugging in the power cord).

This is the easy first thing to check. If this doesn't solve your problem, then by all means follow Ruslan's advice he has far more expertise than I do with the technical aspects of the electronics and a soldering iron.

No disrespect intended ..

we were just suggedsting other alternatives..

I'm sorry if I implied that your solution isn't educated or technically sound..

it was brought only to contrast Ruslan "high tech" solution comparing my "kick the box" idea

It can be any number of things and your suggestion is just as good as ours if not better..

[Sowulo]

Originally posted by condor:
No disrespect intended ..

we were just suggedsting other alternatives..

I'm sorry if I implied that your solution isn't educated or technically sound..

it was brought only to contrast Ruslan "high tech" solution comparing my "kick the box" idea

It can be any number of things and your suggestion is just as good as ours if not better..

Funny thing is I just downed my system to try a different modem with my Talkworks Pro answering system that I use to handle my business line. I have that Power On after Failure turned on to keep my answering system 'hot' when I'm out on a job. With this setting enabled, any time the computer receives power it boots (motherboard monitors the PSU for juice even if you don't turn the system on--I like ACPI). Well anyway, I unplugged the box while I swapped the modem and sure enough, as soon as I plugged it in, the system boots...

And yes, mine is certainly the "low-tech" concept. Keep up the good work. I enjoy learning from your posts.

[imd14u]

Hey guys, at least you keep these forums a bit exciting. Like the tech muscles flexing. It's like a pose down. No puns intended.