The Portable has a few of oddities. It's basically a low power 16MHz CMOS MAC SE. It requires more juice to spin up the HD than the AC adapter can supply, so it needs a charged battery. A couple of ways to approach this:
1. Re-cell the battery. It uses 3, 2V size X cells which my local Batteries Plus store carries, about $12 each.
2. Get a 6V sealed alarm battery and clip leads, and hook it up. Watch polarity! The battery cover has to be in place to close the switch.
3. Get a PowerBook 100 series 7.5V DC adapter, which is higher current and will boot a Portable. Make sure it's good (measure the Voltage) before you hook it to the Mac. I had one go bad recently and it blew out my Power CD. The replacement off eBay was bad, too.
The video output is NOT VGA or anything else known to the civilized world. It is for an external LCD which Apple never shipped.
If it doesn't boot, press both programmer's switches (right side) at once to reset the PMU and hit any key to turn it on.
You can make an adapter to hook the drive to a regular SCSI & power cable, but I've never heard of anyone actually doing that. It used to be easier to just put the drive in another Portable, but a lot of Portables are dying now, and they're not easy to find. The 5120 non-backlit ones usually need re-capping, and the 5126 backlits' custom voltage regulator ICs are failing. The Conner 40MB HDs are also failing. These machines are getting OLD.
1. Re-cell the battery. It uses 3, 2V size X cells which my local Batteries Plus store carries, about $12 each.
2. Get a 6V sealed alarm battery and clip leads, and hook it up. Watch polarity! The battery cover has to be in place to close the switch.
3. Get a PowerBook 100 series 7.5V DC adapter, which is higher current and will boot a Portable. Make sure it's good (measure the Voltage) before you hook it to the Mac. I had one go bad recently and it blew out my Power CD. The replacement off eBay was bad, too.
The video output is NOT VGA or anything else known to the civilized world. It is for an external LCD which Apple never shipped.
If it doesn't boot, press both programmer's switches (right side) at once to reset the PMU and hit any key to turn it on.
You can make an adapter to hook the drive to a regular SCSI & power cable, but I've never heard of anyone actually doing that. It used to be easier to just put the drive in another Portable, but a lot of Portables are dying now, and they're not easy to find. The 5120 non-backlit ones usually need re-capping, and the 5126 backlits' custom voltage regulator ICs are failing. The Conner 40MB HDs are also failing. These machines are getting OLD.