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Topic |
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quinterro
Starting Member
USA
20 Posts |
 Posted - 23 Jul 2002 : 06:47:59
I got a Q900 from a thrift store for $10. It powers up, but no keyboard or mouse will work with it. I've tried different keyboards, mice, cables, PRAM batteries, etc. to no avail. I'm thinking the ADB circuit is shot. :(Any suggestions on what to do about it? I would love to be able to do something with it besides use it as a very large doorstop (I'm doing that now). If I can't get it to work, I'm going to modify it to use a Performa 475 logic board.
:)
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jruschme
Junior Member
USA
196 Posts |
Posted - 23 Jul 2002 : 07:26:56
quote:
I got a Q900 from a thrift store for $10. It powers up, but no keyboard or mouse will work with it. I've tried different keyboards, mice, cables, PRAM batteries, etc. to no avail. I'm thinking the ADB circuit is shot. :(Any suggestions on what to do about it?
Sounds like the keyswitch is in "server" position. <<<John>>> 
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thelip
Full Member
USA
729 Posts |
Posted - 23 Jul 2002 : 07:40:42
yep, here's a little matrix of the key positions:TURNED LEFT:
It's turned off and allows NO keyboard/mouse input. TURNED CENTER:
Normal operation. TURNED RIGHT:
It's on and allows NO keyboard/mouse input. AFAIK, you can unplug the switch from the mobo and it will work. Otherwise you can just do a simple macgyver hack with the pinouts and that should fix it for you. I'll reply later when I have a chance to test the unplugging scenario out. BTW, WELCOME TO THE MLA!!!
_______________________
Sgt. Thelip
Heavy Weapons Specialist - 950 division
Liberated Macs: 12
** SEE IF MY NEWTON IS ONLINE AT nsa68k.kicks-ass.net *** Edited by - thelip on 23 Jul 2002 07:42:15 |
quinterro
Starting Member
USA
20 Posts |
Posted - 23 Jul 2002 : 11:45:50
yep, here's a little matrix of the key positions:TURNED LEFT:
It's turned off and allows NO keyboard/mouse input. TURNED CENTER:
Normal operation. TURNED RIGHT:
It's on and allows NO keyboard/mouse input. AFAIK, you can unplug the switch from the mobo and it will work. Otherwise you can just do a simple macgyver hack with the pinouts and that should fix it for you. I'll reply later when I have a chance to test the unplugging scenario out.
I forgot to mention that I don't have a key for it. I has juryrigged something from a Turbo switch off of an old PC. It let me start up anyway. I'll have to put the RAM, processor, and HD back into it and give it a shot. Will a LC040 work in it? I've already put the full 040 into a Performa 475.
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quinterro
Starting Member
USA
20 Posts |
Posted - 23 Jul 2002 : 18:33:07
I can say that the Q900 will power up without the keyswitch attached. I took the Q900 home to put everything back in. :)However, I don't have all of the cables attached yet (floppy, original SCSI cable - they're still at work), so I get the disk with the question mark on it. :( Currently a freshly formatted 1GB Quantum is installed, and an Apple 2x CD is connected from an external case. With the MacOS 7.6 CD in the drive and powered up before turning on the 900 and holding down C after starting it up, it will not boot from CD. A fresh PRAM battery from a Performa 475 is installed. Eventually I'll get another one for it. I still don't know how much RAM is installed, but I'm assuming 12MB. I know 4 of them are 1MB simms. Under the hat... |
thelip
Full Member
USA
729 Posts |
Posted - 24 Jul 2002 : 05:32:51
That sounds like some scsi voodoo to me. Check termination. I don't have a 900, but on the 950 the termination is on the mobo so you don't terminate drives. Does anybody know if that's the same for the 900?_______________________
Sgt. Thelip
Heavy Weapons Specialist - 950 division
Liberated Macs: 12
** SEE IF MY NEWTON IS ONLINE AT nsa68k.kicks-ass.net *** |
quinterro
Starting Member
USA
20 Posts |
Posted - 24 Jul 2002 : 06:16:00
quote:
That sounds like some scsi voodoo to me. Check termination. I don't have a 900, but on the 950 the termination is on the mobo so you don't terminate drives. Does anybody know if that's the same for the 900?
I think it is. The original SCSI cable has a terminator on it. I put that cable back in this morning, along with the floppy cable. I set the HD to ID 0, no termination. It still doesn't see it. It will boot the MacOS 7.6 CD from an external IBM/Panasonic 4x CD-ROM drive though. ----------------
Under the hat... |
quinterro
Starting Member
USA
20 Posts |
Posted - 24 Jul 2002 : 13:37:54
Problem solved! (I think)The reason the drive could not be recognized is that the original SCSI ribbon cable was bad. I tried one with 3 connectors (logic board, drive, and terminator from the original). Both the 1GB and a 500MB drive were then recognized. Now to look through my collection to find a cable with a length similar to the original. Thanks for all of your help. I'll take a siesta under my hat now... ----------------
Under the hat... |
~Coxy
Leader, Tactical Ops Unit
Australia
2822 Posts |
Posted - 24 Jul 2002 : 17:23:59
Building custom SCSI cables is pretty cheap and not that hard. Just a thought, if you have none yourself.~Coxy - Leader, Tactical Operations Unit
Mayor of NuBus City v3.0
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quinterro
Starting Member
USA
20 Posts |
Posted - 24 Jul 2002 : 18:05:20
quote:
Building custom SCSI cables is pretty cheap and not that hard. Just a thought, if you have none yourself.
I've got tons of cables (IDE, SCSI, floppy). The problem is finding one of the right length. You're right though - building one should make a better fit than most of what I have. quinterro ----------------
Under the hat... |
~Coxy
Leader, Tactical Ops Unit
Australia
2822 Posts |
Posted - 24 Jul 2002 : 18:22:48
Have you ever seen my 950 'hack'?
www.68kmla.com/website - it's under "Surplus"~Coxy - Leader, Tactical Operations Unit
Mayor of NuBus City v3.0
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Repairing a Quadra 900
68k of the Week: kastegir's PowerBook 180.