Neo2.5 DVD tray won't open and blue light are gone

[XtraLongshot]

HELP!!!!
I just installed the 2.5 dvd on my ps2 V5. tested with the case open it work fine. then when i put it back together . the tray it will not open and the blue light are gone. and the screen is blank.I checked with the board and all the ribbon connection, it all connected properly. the only problem it seem to be is no power to the drive . but when the system is on standby mode and I press the eject button the system go on but the tray won't open and nothing on screen. please help me asap. thanks