Car Marty has two types. Photos are primarily of the MVP-1 model

Power supply is ADV-1 that is center positive and 12V. Most Car Marty in the wild doesn't have the original power supply.

Inside Car Marty is a Power card that has large power filtering capacitors responsible for power filtering to the motherboard and some video filtering.

Car Marty also has a very small motherboard with the 386SX. It's possible to change the 32mhz clock to a 36mhz one overclocking a bit.

CD ROM drive is same as the FMT laptop which uses polarized tantalum capacitors.