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тАО05-03-2005 10:45 PM
тАО05-03-2005 10:45 PM
N4000 CPU upgrade to 550 Mhz
I have a HP9000 N4000 (A3639B) server with 1 processor PA-RISC 8500 360 Mhz.
I wanted to upgrade the processor to a 550Mhz one.
After swapping out the CPU and changing the dipswitches, the system won't enter the selftest anymore.
Did a PDC firmware upgrade to 43.43, but this did not work. HP 11i is installed as well.
Any suggestions?
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тАО05-04-2005 12:26 AM
тАО05-04-2005 12:26 AM
Re: N4000 CPU upgrade to 550 Mhz
if you do not get any selftest msgs I would suspect the CPU is bad and maybe the power monitor switches off to prevent major damages.
you would need another (550MHz) CPU to verify...
Bernhard
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тАО05-04-2005 01:07 AM
тАО05-04-2005 01:07 AM
Re: N4000 CPU upgrade to 550 Mhz
thanks for your quick response.
I have tried it with another CPU as well,
same result.
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тАО05-04-2005 01:55 AM
тАО05-04-2005 01:55 AM
Re: N4000 CPU upgrade to 550 Mhz
Stf ;-)
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тАО05-04-2005 02:00 AM
тАО05-04-2005 02:00 AM
Re: N4000 CPU upgrade to 550 Mhz
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тАО05-04-2005 02:08 AM
тАО05-04-2005 02:08 AM
Re: N4000 CPU upgrade to 550 Mhz
Stf ;-)
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тАО05-04-2005 02:33 AM
тАО05-04-2005 02:33 AM
Re: N4000 CPU upgrade to 550 Mhz
The PA-RISC system board that takes the PA-RISC 8500 (440MHz and 360MHz CPU's) are:
A3639-60006 and or A3639-69706
The PA-RISC system board that takes the PA-RISC 8600 (550MHz, 440MHz, & 360MHz CPU's) are:
A3639-69420 and or A3639-60020
Jesse
Cypress Technology Inc
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тАО05-04-2005 09:30 AM
тАО05-04-2005 09:30 AM
Re: N4000 CPU upgrade to 550 Mhz
Two questions:
First, what switch settings are you using? Should be 1,4,5,7,8 set on ON for Switch 1.
Second, what Processor Support Module are you using? It should be A5168A.
Oh and check the "fuzzy button" connection points on the system board. It's possible that one of them came off of the 360mhz cpu that your removed. That could prevent the 550mhz cpu from being seen.
Be aware that you will not be able to set the Model String, that has to be set by an HP Engineer.
I hope this helps, let us know what fixes your problem.
Good Luck - Tim
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тАО05-05-2005 09:39 PM
тАО05-05-2005 09:39 PM
Re: N4000 CPU upgrade to 550 Mhz
I got the server up and running, but it has left me slightly confused.
I took a 550Mhz CPU out of an A3639C from CPU slot 3 and put it in the A3639B (in slot 1).
The system wouldn't go into selftest.
I took out the cpu again, and this time I removed the CPU from the A3639C that was in slot 5.
I put it in the A3639B (slot 1), again nothing.
Now I took out the cpu again, and this time I removed the CPU from the A3639C that was in slot 1.
I put it in the A3639B (slot 1), and the system booted.
So my guess was that maybe I had 2 faulty CPU's, however when I put one of the the 'faulty' CPU's in slot 3 to run next to the other CPU, the system showed 2 working CPU's!
Anyone have an explanation for this?
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тАО05-06-2005 03:47 AM
тАО05-06-2005 03:47 AM
Re: N4000 CPU upgrade to 550 Mhz
The bottom side of the CPU module has a connection device called "fuzzy buttons". These fuzzy buttons are essentially a one-time use item, per HP. You MAY get away with moving a cpu from one system board to another, but there is no guarantee that it is going to work. You see, over time the material gets compressed and may not make a good connection to the system board. Other times you will find that the fuzzy buttons fall off the cpu, now you have NO connection between that particular trace on the cpu and system board which usually means no boot. So, check the bottoms of your cpus.
Good Luck - Tim