Thanks, this is a good start. Question, though: on the brick, is pin 4 positive or negative? Bob -----Original Message----- From: JP Hindin [mailto:jplist@kiwigeek.com] Sent: Friday, March 07, 2003 3:19 PM To: cctalk(a)classiccmp.org Subject: Re: Power pinouts for Compaq SLT286? <snip> The battery, when looking at it towards the connectors: ---------------------- | XXXX | |______________________| Where X's are contacts, from left to right: GND, 12.5v, 12.5v, 13.3v (Batt is Compaq part #130538, Model 2682) I don't know enough about electronics to understand how the power supply works. The unit has two lights, which I'm guessing are 'On' and 'Charging Battery'. When the unit is first turned on, the 'On' pulses. There are Eight pins, not 6: (Piss poor ASCII arrangement on left, my pin numbering on right) X X X 1 2 3 X X X 4 5 6 _ _ 7 8 If you cross 3 & 6, the 'On' light stays on, presumably the trigger to tell it to send voltage. With one probe between the 3&6, and another on 4, I get 18vDC. <snip> JP Hindin