I have a powertower pro g3 running 9.1 and 10.2. I removed the boot hd to another box i was putting together. When I returned that drive to the origional box i got the fashing question mark. I flashed pram i tried booting to floppy (spit out with "X" floppy), and booting to 9.1 cd with hotkeys. Nothing would boot. I swapped cdroms changed scsi id's teminated the cdrom, terminated the last hd on chain...no luck. It seems like either im missing something here.
Any ideas?

thanks

So let me get this strait, nothing is working in the box, not even booting from the install disk?

Also what exact model are we talking about here, I.E. stock speed if you upgraded it and the numbers on the tower, I.E. PowerMac 6300/120 or PowerMac 9600, and a complete list of internals would be nice, anything info you can give us can speed up the process of fixing it.

right. nothing.
currently only cdrom on end os scsi cable (termd)

powertower pro w/pcc 5000-0121-05 logicbd
sonnet G3/300 1m (but u=iv have swapped out to origional 604 to troubleshoot)
50 pin nativa o/b scsi contoller origionally using a chain of 3 9.1. IBM DCHS h/d's (hfs+)
one cdrom (apple) one end of chain but also tried nec and phillips cdrom's all verified working.

Is there a way to verify the intergrity of the system bus?
thanks for your help

Hhhmmm... this is a Mac clone right? I have a very limited knowledge of the clones but I'll ask a friend who owns one, he's pretty good with the older systems. Have to call him later.

It's a clone alright.

The PowerTower Pro was introduced in July 1996 By PowerComputing Corp. It has a PowerPC 604e with either, 180, 200, 225, 250 or Dual 250 Mhz,

32 KB L1, 1 MB L2 Cache

64 bit Data Path

51.43 Mhz System Bus

2 GB Hard Disk

Floopy Drive (1.44MB), 8x CD-ROM Drive

Original OS of Mac OS 7.5.3
Maximum OS of Mac OS 9.1

Maximum RAM of 1024 MB (1GB)

8 - 168 pin FPM DIMM sockets

70 ns Ram speed

ixMicro TwinTurbo Graphics Card with 8 MB VRAM

No built in Display, and the connecter is DB-15

6 PCI slots
Hard drive is SCSI
No modem
No airport

PRAM Battery is 3.6V lithium
Power 300 Watts

1 ADB Port
2 Serial Ports
SCSI is DB-25
Ethernet is AAUI and 10BaseT
16 Bit Stereo

Well iapparently this logicboardn is particular about its cdrom's. 5 of 6 cdrom's would not boot the board. Finally it booted to cd. I rebooted and sure enough both drives mounted and were bootable.

nice.