HP P4300 G2 Storage endless boot loop

Hello,
today I shutdown my management group because I had to maintenance my usv.
Later I started the systems and one of the P4300 does not come up.
It´s like a loop, on the monitor I get no informations. The HDD LEDs on the front are flashing after some minutes again.
On the back of the server the LAN ports are not flashing only the connection light is on and the management port looks ok.
On the board there a some LEDs (CR1 CR2 CR3 CR4 CR5 CR6 CR7 CR8) does someone knows the meaning of this LED´s?
On a running system CR1 is off, CR 2 is on, CR 3 is off the others are on too.
On the looping system CR2 is on all others are off then CR8 is on all others are of after a second CR1 and CR2 are flashing rotational then all LEDs are of and same game again, an endless loop.
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Loki555Asked:
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arnoldCommented:
Do you have the option to call HP?

Not familiar with HP, but using the user manual and references for troubleshooting the issue.

http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c02008676-4.pdf
http://h30499.www3.hp.com/t5/HP-StoreVirtual-Storage-LeftHand/Evaluating-HP-P4300-G2-7-2TB-SAS-Starter-SAN-iscsi-performance/td-p/6159089#.VPtb24Y8KrU

Often things that do not pass checks means the issue might be memory seating.  Recheck those to make sure they are snuggled:fitted in their respective slots.
andyalderSaggar maker's framemakerCommented:
There's no maintenance and service guide for that product, it's a DL180 of sorts but doesn't have the standard motherboard. All I can suggest is strip down to single DIMM single CPU and remove PCI card to see if it passes POST that way.
Loki555Author Commented:
I called HP and the service changed the mainboard. The system is but.
After the first boot the lun was OK then the cluster has to be shutdown again to change the serial number.
Now the lun shows "unrecoverable I/O", HP told me to rebuild the lun.
Any other suggestions to hopfully get the system back without rebuilding?
andyalderSaggar maker's framemakerCommented:
HP are probably right, back up if you can, delete the LUN and recreate. Either that or send off for data recovery.

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