Jumper to turn on power supply w/o motherboard?

Russell F. · 10-07-2007, 08:24 PM

How do I fool my old power supply to come on without being attached to a motherboard. I am trying to recover data from an older hard drive. I have jumpered it to slave, and have a new computer to plug it into. However the new computer power supply plug does not match the old big molex type connector on the old hard drive. I do have an extra power supply that will connect, but without a mother board it won't power up. I suspect there is a way to jumper pins on the large 20 pin power supply connector to turn on the power supply. Any one know the correct pins?

Thanks.

JohnthePilot · 10-08-2007, 01:38 AM

Hi Russell and welcome to TSF.
Yes, take a length of wire and bare both ends and put one end into the connector for the green wire and touch the other to the connector for a black wire. This is the equivalent of pressing your power button.

TERBObob · 05-11-2008, 10:10 AM

This is fine for an ATX , but how do you do ( manually turn on ) an old AT power supply ?

dai · 05-11-2008, 04:33 PM

http://pinouts.ws/at-power-supply-pinout.html

10-07-2007, 08:24 PM	#1 (permalink)
Russell F. Registered User Join Date: Oct 2007 Posts: 1 OS: xp	Jumper to turn on power supply w/o motherboard? How do I fool my old power supply to come on without being attached to a motherboard. I am trying to recover data from an older hard drive. I have jumpered it to slave, and have a new computer to plug it into. However the new computer power supply plug does not match the old big molex type connector on the old hard drive. I do have an extra power supply that will connect, but without a mother board it won't power up. I suspect there is a way to jumper pins on the large 20 pin power supply connector to turn on the power supply. Any one know the correct pins? Thanks.

10-08-2007, 01:38 AM	#2 (permalink)
JohnthePilot Asst Manager, TSF Articles Join Date: Mar 2006 Location: Cheltenham, near Wales. Posts: 25,211 OS: XP Home SP3, PCLinux, Vista Home Premium SP1 My System Blog Entries: 1	Re: Jumper to turn on power supply w/o motherboard? Hi Russell and welcome to TSF. Yes, take a length of wire and bare both ends and put one end into the connector for the green wire and touch the other to the connector for a black wire. This is the equivalent of pressing your power button. __________________ Submit New Articles Here If you feel that TSF has helped you please make a donationand help to keep the forum free Cenedl heb iaith, cenedl heb galon Folding@Home - Team 85015

05-11-2008, 10:10 AM	#3 (permalink)
TERBObob Registered User Join Date: May 2008 Posts: 5 OS: XP pro	Re: Jumper to turn on power supply w/o motherboard? This is fine for an ATX , but how do you do ( manually turn on ) an old AT power supply ?

05-11-2008, 04:33 PM	#4 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 38,761 OS: vista 32x ultimate retail	Re: Jumper to turn on power supply w/o motherboard? http://pinouts.ws/at-power-supply-pinout.html __________________