Tecra 9000 - LED flashes and cannot boot

I was recently given an old Tecra 9000 laptop. Unfortunately, it did not have a HDD (it was removed and trashed by the previous owner).
I have bought a couple of HDDs that I thought should work in this machine, but all that seems to happen is the power light flashes seven times, pauses, then flashes once (and then repeats this.
I assume this is an error code of some kind.
The drives I have tried are a MK4025GAS and a MK4026GAX. The result is the same on both.
Can someone advise as to what this error means, or even tell me the part number of a drive that will work with this machine?
Many thanks.

Hi Guy
One question; did you try to power up the notebook without inserting the HDD?
Usually if the notebook is ok it should be possible to start the notebook. Of course the notebook will not load the Windows OS because the HDD is missing but it should be able to start and the LED should not flash!!!
But if the LED flashes this means that the fault was detected on the motherboard and the LED lamp sends a blinking code.
The short blinking means 0 and the long blinking means 1
Error code starts with LSB (least significant bit)
for example:
0000 0001 -> 1000 0000
This code you have to transform in hex and you will get the error code.
But in my opinion nobody will give you an answer what it means.
Every notebook series porvides own error code...

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PowerBook G4 - Won't Start Up - 3 Strange Beeps then just LED flashes and sudden death - black screen.

PowerBook G4 - Won't Start Up - 3 Strange Beeps then just LED flashes and sudden death - black screen.
Prior that the powerbook also couldn't start but I could see the Apple logo, so via fire-wire (holding T at start up) I backed up the hard disk.
Check via DiskToolPro the structure, defragmented. Via DiskWarrior rebuild the directory
and finally not been able to access the drive I reformatted the drive via fire-wire drive.
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Re-started again and it give me one long beep and black screen. An indication that my 1gig RAM is bad or gone (?) and the DVD is stuck inside.
Bought new one 1 gig, installed it and now I'm getting only three beeps.
I tried all, changed the slots several times and nothing.
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Do I have to replace the Logic Board?   (Anyone has a spare one ?)
But it is the faulty Logic board?
Could anyone help me out? Please.
I'm retired and I cannot afford a new laptop - and this powerbook was a great, great horse for me until that horrible set of three beeps.
Thank you in advance for any advice and help.
Martin
THE SPECS OF MY POWERBOOK:
Model Family:
Powerbook G4 Aluminum
Processor:
1.67GHz G4 (PowerPC 7457B)
Manufacturer:
Motorola
# of CPUs:
1
Codename:
Apollo 7
Display:
Size:
15.2"
Finish:
Matte
Resolution:
1280x854
Backlight:
CCFL
Base Memory:
1gig PC2700 SODIMM
Brand:
Apple
Wireless:
802.11b/g
Color(s):
Aluminum
Original OS:
Mac OS X 10.6.3
Battery:
50-watt-hour removable lithium-ion battery
Graphics:
ATI Mobility Radeon 9700 (64MB)
Base Storage:
80GB 5400RPM EIDE 2.5"
Optical Drive:
8x Superdrive
Model Number:
A1106
Sales Number(s):
M9677LL/A
Machine Number(s):
PowerBook5,6
Dimensions:
13.7 in x 9.5 in x 1.1 in
Weight:
5.6 lb
Production:
Jan 31, 2005 - Oct 19, 2005
Factory:
China
Production Year:
2005
Production Week:
35 (September)
Production Number:
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But it is the faulty Logic board?
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The problem with seeking a used logic board for these models is that so many had their boards replaced that it increases the chances of the boards in the used/pulled markets having the same problem you have now. The replacement program also came close to exhausting the supply of new boards,
If it turns out to be a bad LB and you can't find a replacement, consider how used computer pricing works: A used computer is worth hugely more in parts than if bought as a working unit. I.E, you can probably find a working PowerBook that will cost less than the logic bard alone. It also possible to find a used MacBook Pro for less that a replacement LB.
If you tell us your approximate geographic location, we can see what's available nearby. I'm also retired, and and visiting my wife's family this week so have even more time than usual to help you search.
Regards,
Allan Jones

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want to verify that the command key is indeed the apple key to the left of option key?
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Tried the reboot using the del opt cmd shift combo (proving apple key is indeed the cmd key?) It was different than c attempt startup, seems like it hesitated and was probably looking for something, and eventually brought up the loading wheel with apple preload screen.
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Thanks, but no luck so far.
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Error 1402 | Error 1406 | Acrobat, Reader
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Tecra 9000 - LED flashes and cannot boot

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