HP 8566B Spectrum Analyzer "YTO Unlock" Repair HD

JLCPCB: https://jlcpcb.com/ ($2 for 10pcs PCBs, 2 days Build Time & 3 days DHL Delivery) Almost forgot this is the 100th video on my channel! High res photos at http://www.kerrywong.com/2018/05/10/hp-8566b-spectrum-analyzer-yto-unlock-repair/