Dead NV+

There is no service manual available for consumers. There were some posts a while back on replacing the PSU int the NV/NV+. Basically, your turn it off, removed the drives noting the bay in which each drive was installed. Then remove the 4 screws holding the side panels in place and slide each panel about 3/8" to the rear and remove to the side. You then remove the 4 screws holding the back plane with the cooling fan in place and remove it. Then unplug the cooling fan, noting the connector for the fan power. Then you can removed the four screws holding the PSU/bottom panel in place. One of the screws should be covered by a sticker stating that removing that screw will void the warranty. Then the old PSU can be moved to the rear and the power plug disconnected. The PSU can then be completely removed. The replacement is just the reverse.

The only reason to remove the top panel is to access the memory slot.

It will be far easier to remove the four drives, noting which bay in which they are installed. Then install a spare drive in the spare chassis, connect it and install the firmware (takes about 15 mintues), upgrade the FW (another 15 minutes), the power down, remove the spare drive, install the four drives from the bad chassis (keeping them in the same respective bays) and power up.