DPO7254 Fails SPC, all channels seem to work

I bought a DPO7254 oscilloscope that seems to work fine except that it keeps falling an SPC. All the channels seem to work. The only thing I see is that channel 2 and channel 4 are not exactly on 0 but maybe 1.5mV lower then 0. 
How can I get the error codes to see why the SPC is failing?

Details on how to use the built-in instrument diagnostics are on page 4-26 of the service manual: https://www.tek.com/en/oscilloscope/dpo70000-mso70000-manual-6

I seen that already but I guess I’m missing something. The diagnostics tests do not have any faults. Thanks for the response.

That's interesting, might hint that your acquisition hardware is good but some of the SPC hardware is bad.

I took it apart and checked resistance on all relays. I powered them up one by one and they all are within 0.1Ohm between contacts. I’d like to see what the reason for the failed SPC so I can at least have an idea what channel is causing it. 

I was able to locate the error logs, seems like SPC is failing due to a missing trigger on channel one? Channel one trigger seems to work fine though. Here is the error log:

SHOWTIME: SPC: starting 17:59:54
SHOWTIME: SPC starting step : Set SPC defaults
SHOWTIME: SPC completed step : Set SPC defaults 00:00:01
SHOWTIME: SPC starting step : Get Temperature
SHOWTIME: SPC completed step : Get Temperature 00:00:00
SHOWTIME: SPC starting step : Hfd144 safe 50ohm values
SHOWTIME: SPC completed step : Hfd144 safe 50ohm values 00:00:01
SHOWTIME: SPC starting step : A2D linearity cal
Linearity cal took 5 passes
SHOWTIME: SPC completed step : A2D linearity cal 00:00:18
SHOWTIME: SPC starting step : Hfd144 Null input current
SHOWTIME: SPC completed step : Hfd144 Null input current 00:00:06
SHOWTIME: SPC starting step : Gain Normalize hfd144
SHOWTIME: SPC completed step : Gain Normalize hfd144 00:00:02
SHOWTIME: SPC starting step : A2D gain/offset pass 1
A2D gain 194 - 450; A2D offset 80 - 794
SHOWTIME: SPC completed step : A2D gain/offset pass 1 00:00:32
SHOWTIME: SPC starting step : Et Cal
SHOWTIME: SPC completed step : Et Cal 00:00:13
SHOWTIME: SPC starting step : Demux Phase Cal
digPhaseCal succeeded
SHOWTIME: SPC completed step : Demux Phase Cal 00:00:03
SHOWTIME: SPC starting step : A2D interleave
SHOWTIME: SPC completed step : A2D interleave 00:00:21
SHOWTIME: SPC starting step : A2D gain/offset pass 2
A2D gain 192 - 449; A2D offset 80 - 793
SHOWTIME: SPC completed step : A2D gain/offset pass 2 00:00:14
SHOWTIME: SPC starting step : A2D gain/offset pass 3
SHOWTIME: SPC completed step : A2D gain/offset pass 3 00:00:00
SHOWTIME: SPC starting step : A2D gain/offset cleanup
SHOWTIME: SPC completed step : A2D gain/offset cleanup 00:00:00
SHOWTIME: SPC starting step : Hfd144 varigain DAC
SHOWTIME: SPC completed step : Hfd144 varigain DAC 00:00:03
SHOWTIME: SPC starting step : LF Comp for M668
SHOWTIME: SPC completed step : LF Comp for M668 00:00:03
SHOWTIME: SPC starting step : Hfd144 offset DACs
SHOWTIME: SPC completed step : Hfd144 offset DACs 00:00:06
SHOWTIME: SPC starting step : M668 offset DACs
SHOWTIME: SPC completed step : M668 offset DACs 00:00:04
SHOWTIME: SPC starting step : Hfd144 stepgain
SHOWTIME: SPC completed step : Hfd144 stepgain 00:00:11
SHOWTIME: SPC starting step : M668 stepgain
SHOWTIME: SPC completed step : M668 stepgain 00:00:12
SHOWTIME: SPC starting step : Hfd144 Bandwidth limit gain
SHOWTIME: SPC completed step : Hfd144 Bandwidth limit gain 00:00:02
SHOWTIME: SPC starting step : Hfd144 offset
SHOWTIME: SPC completed step : Hfd144 offset 00:00:09
SHOWTIME: SPC starting step : M668 offset
SHOWTIME: SPC completed step : M668 offset 00:00:05
SHOWTIME: SPC starting step : Hfd144 offset gain-correction
SHOWTIME: SPC completed step : Hfd144 offset gain-correction 00:00:40
SHOWTIME: SPC starting step : M668 offset gain-correction
SHOWTIME: SPC completed step : M668 offset gain-correction 00:00:41
SHOWTIME: SPC starting step : Gain Validation
SHOWTIME: SPC completed step : Gain Validation 00:00:00
SHOWTIME: SPC starting step : Trig gain/offset/hysteresis
** 1B failed -- no trigger found. **
18:04:11:125[2456] caltrig.cpp:calTrigGainOffsetAndHysteresis(123) error calibrating gain/hysteresis on channel 1
CAL: SPC returned an error in step Trig gain/offset/hysteresis
SHOWTIME: SPC: failed and quit 00:00:10
total time 00:04:17
CAL: SPC failed
DRAM is Mt_ddr2_512M_667

Dram Calibration results:
-------------------------
DramCal has PASSED on all Demuxs

DRAM is Mt_ddr2_512M_667

Dram Calibration results:
-------------------------
DramCal has PASSED on all Demuxs

digPhaseCal succeeded