Please help me, lost sn and product number.

[SUNAUS]

With the following error, what could I do? thanks a lot.
1. The serial number is always lost when the server boot up. Message is,
WARNING: The system serial number is invalid.

2. One Fan is faulty.
Cabinet 0 Hardware Inventory:
Component Present Failure State
--------- ------- ------- -------
Cabinet Fans (blowers) 8 1 unknown

3. The Product Number also is always lost,
HPUX Model Number......: N4000
HPUX Model String......: 9000/800/N4000-55
Original Product Number: A3639B
Current Product Number.:
System Serial Number...:
Hversion...............: 0x5d30
Sversion...............: 0x491
Software Capabilities..: 0x100000f1

[Torsten. · Accepted solution]

Hi,

contact the hp support. Special tools are needed to correct the serial number.

[SUNAUS]

Could you tell me why SN is lost? which hardware is faulty? GSP or system board?

[Torsten.]

This has to be investigated.

[Darren Murray_1]

continue without any ideas, looks like we have to contact HP support for using ss_update to correct sn, but we have no service contract.