MSL5030 tape library remains off after power on

[Marino Meloni_1]

in partsurfer I can see:
331226-001 Control panel PC board ('Auto Power-On' version) - For StorageWorks MSL5026, MSL5030, and MSL6030 series tape libraries

this is the replacement part, but it may help

http://partsurfer.hp.com/cgi-bin/spi/main?sel_flg=partlist&model=MSL5026-GRAPHITE&HP_model=293472-B23&modname=MSL5026S2+2+SDLT+320+Drives+Rack-mount+Graphite+%282+320GB+rack%29&template=main&plist_sval=ALL&plist_styp=flag&dealer_id=&callingsite=&strsrch=&keysel=%3F&catsel=%3F