Troubleshooting TRS-80 Model 4 & NEC Multispeed EL
Hi, so, I wasn't really sure where else to post about this. I got these two devices from a thrift store with the intent of restoring them (eventually). I'm in the early stages.
So, the TRS-80 Model 4 (not the CoCo). In the store, I plugged it in, turned it on, and the floppy drive made a few little read noises, then the CRT came on with the prompt "Cass?" This seemed promising, so I took it home. I'm not sure if I broke something in transit, but when I plugged it and turned it on at home, floppy drive 0 immediately just started this horrible churning noise, like it was spinning nonstop (there is no media in the drive). When the CRT came on, it said "Diskette?" So, basically, I'm wondering if anyone has heard of this sort of problem before, or has any idea what it might be. (Or perhaps it's not even a problem, and it's supposed to sound like that? Like I said, early days, but it sounds horrid. If this behavior is normal, then I have no idea what I did to prompt it to try to read a cassette initially in the store.) I am having trouble finding info about this model. Perhaps it's just waiting for a system disk, which I sadly don't think I have yet; there is a mysterious floppy in drive 1, but I'm afraid to put it in drive 0 for fear of damaging it, and I don't have anything else with a 5.25" drive right now.
As for the NEC Multispeed (an IBM-compatible portable with an 8086 clone processor), it did not come with a charger and I have no idea if it is at all functional. It says to use only a 13.5v 1.5a charger. I scrounged around the house and the closest I could come up with were 12v 2a and 12v 1.5a. Neither one seems to do anything. So my question is, can I rule out the charger as the problem? I don't know much about electrical engineering. Or, will I not know whether the problem definitely lies with the computer itself, as I suspect, until I get a charger that matches the specs exactly?
Thanks for reading!