When you ship #vintagecomputers, folks, *PLEASE* cover and protect the openings before pouring packing peanuts into the box!
I now own a TRS-80 Model III that *must* be disassembled because styrofoam peanuts are clogging the disk drive cavities and edge connector openings.
BOOT ERROR PB
Meaning: Remove peanut butter & jelly sandwich or other foreign object from disk drive.