That's weird, almost the same post was made for a T17+ just a short while ago. Response is roughly the same tho...
A - Can we see the message indicating three three simultaneous pic malfunctions?
B - What is the voltage across the first and the last pins of the PIC?
The chances of three simultaneous PIC malfunctions are pretty miniscule, a better explanation is that the control board is not supplying the voltage it should to activate the PICs it needs to communicate with.
P.S. We call the code a PIC runs "the HEX" and the code the controls board runs "the Firmware"(even though technically they are both correct terms for both devices).