HP 9816 Desktop Computer

HP 9816 Desktop Computer, 1982-vintage, 68000 Processor, 2.5M Ram (256K on CPU Card, Aftermarket 2MB Card, and HP 256K Card), HPIB (IEEE 488) interface for mass storage and control of peripherals, Data Communications Interface (rs232 Serial) on A50 connector. Has the Graphics option installed, and includes the large keyboard, with the rotary encoder knob. The power supply is intermittent. It powers-up occasionally, but there's quite a HISS in the power supply. (Bad Capacitor) Also, the RAM Error indicated in the screenshots was cleared after re-seating the RAM cards.