Are your cables OK?
If you isolate the issue to the PSP2, people have sent it to Vark Audio and he's repaired it.
14-14.5 hours of recording with both pre's (48v on) on the Naztech and I crapped out for bed with 2 bars left on the battery. All in all a solid festival solution!
I woke up this morning to turn it all on only to find the left channel on the PSP-2 just clicking (passing no sound). I swapped batteries and threw 9v at it to see if it was voltage related and it is not. It is not the capsule either as I swapped out the 2nd AK40 and it still clicks.
Mics: B&K 4011, Schoeps MK5 (Nbobs, Naiant PFA), Busman BSC-1 (K11/K21/K31/K41 caps), Church CA-14 (o, c), Church CAFS, Core Sound Binaurals
Pre: EAA PSP-2, Lunatec V3, Nbox-Platinum, Church CA-9200
ADC: Mytek 192 ADC, Oade Mod SBM-1
Rec: Oade Supermod PMD-661, Tascam DR60D, M-Audio MicroTrack II, Korg MR-1 (32GB SSD mod); Sony PCM-M10, Edirol R09HR; iRiver HP-120
Photo: Canon 5D3, Canon EF-S 17-55mm f2.8, Canon EF 35mm f1.4L Canon EF 24-70 f2.8L MkI, Canon EF 70-200mm f2.8L IS MkI, Canon EF 50 mm f1.4, Canon EF 50 f1.2L, Canon EF 300 f/4L IS, Canon EF 100-400 f4-5.6L IS MkI
Video: Canon HF100