Drive powers up and resets normally, but if LOAD is attempted, spindle motor runs with red LED out. Screen displays "SEARCHING FOR ..." and stepper does not move. 

• UE6 74LS193 LOGIC (BINARY COUNTER) 
• UD4 9602 (8602) LOGIC (MMV) no sub with later board 74LS123!

When the computer is turned on, the reset signal from the computer should cause the drive (and other peripherals like the printer) to reset. The red LED and spindle motor should come on and go off within a few seconds. If that doesn't happen, try a substitute serial cable. If that's OK, suspect the interface chips in the computer or VIA chip in the drive. If the computer resets other peripherals, it's probably OK. Note that a drive may stay in reset (red LED on and spindle turning) if connected to a computer that is turned off. That's normal. Disconnect or turn on the computer to check.

About the Commodore 1541 Disk Drive     

There were two main versions of the 1541 drive, The Newtronics twist-door and the ALPS push down.

I was searching for some repair information and my search pulled up some answers in the website the of CARLSEN ELECTRONICS, but unfortunately it was no longer there so I had to use the Way Back Machine (https://web.archive.org/) to get what I wanted (https://web.archive.org/web/20210602142532/http://personalpages.tds.net/~rcarlsen/). I have found all kinds of good nuggets and so I figured I start off with a series on Carlsen's Nuggets.