Basic Information:
Printer Model: zero G mercury
MCU / Printerboard: manta m8p with cb1
`klippy.log’
klippy log.zip (3.0 MB)
Describe your issue:
i get random errors mainly to do with mcu connection issue. CB1 is installed in the manta M8P
Hi. Looking at you log file, I noticed that the last logged messages and/or the dumped messages are related to neopixel. with two neopixel chains of 96 and 132 LED’s and tons of elaborate effects, I guess that you CPU is getting overloaded. This would be in line with the log comment below:
Transition to shutdown state: MCU 'mcu' shutdown: Timer too close
This often indicates the host computer is overloaded. Check
for other processes consuming excessive CPU time, high swap
usage, disk errors, overheating, unstable voltage, or
similar system problems on the host computer.
I’d disable the neopixel to see if it has an impact. If so, maybe you shoud add a separate MCU for your light show 
Cheers
Florian
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