Author finds an Agilent 2000a / 3000a Oscilloscope in rough shape on an online auction site. The scope doesn’t boot due to possible power supply failure or NAND corruption. Author purchases the scope for $220. Scope is disassembled and repairs begin. Author discovers a damaged encoder and a TSOP48 NAND memory package that may be causing the boot issue. Author explores the intricate components of the oscilloscope’s main PCB. The process involves checking voltages, locating a UART header for serial communication, and using a logic analyzer to identify Tx and Rx pins for debugging. Repairs progress with the help of detailed resources from online communities.
https://salvagedcircuitry.com/2000a-nand-recovery.html