Met One Instruments Aerocet 531 Mass Monitor/Particle Counter - AS IS 131911903270 but it is not responsive

but it is not responsive

Manufacturer Cognex / Opt Model Number CAM-CIC-5000R-14-G / OPT-AC2514-5M SKU 19-62840 Ref 23-100307

Manufacturer Infinity Model Number 333592 SKU 19-59944 Ref 23-85030

Manufacturer Keithley Model Number 213 SKU 19-37988 Ref 23-80673

Met One Instruments Aerocet 531 Mass Monitor/Particle Counter - AS IS 131911903270 but it is not responsiveThis item is sold AS IS. No returns or exchanges are accepted. Condition For parts or not working Description When powering on, the screen only shows two blank lines and never boots. The buttons are responsive. For this reason, we are selling the unit AS IS for parts repair as a non working or incomplete unit. We have not tested inspected any further, item may have unknown issues we are not aware of. See all item photos for the condition of the unit.