NEC M551 Commercial Display Monitor - Input or output not working

All items are Like New-Open Box Condition unless otherwise noted. Very Good shows hardly nocitcable blemish(es). New is brand new. All of our items are 100% functional, have all accessories originally included, and usually come in original box, if not original box nice generic packaging. UPC:

805736072914

language_tag:

en_US

connectivity_technology:

HDMI

marketplace_id:

ATVPDKIKX0DER

unit:

degrees

resolution:

4K UHD 2160p

unit:

pounds

model_name:

M551 MultiSync

brand:

NEC

unspsc_code:

43211902

item_type_keyword:

digital-signage-televisions-and-displays

part_number:

M551

aspect_ratio:

16:9

color:

Black

screen_surface_description:

Glossy

manufacturer:

NEC

model_number:

NEC M551

special_feature:

High Dynamic Range

unit:

inches

technology:

LCD

type:

Edge-lit

item_name:

NEC M551 MultiSync - 55 inch Diagonal Class M Series LED-Backlit LCD Display - Digital Signage - 4K UHD (2160p) 3840 x 2160 - HDR - Edge-lit

product_site_launch_date:

2021-12-13

mounting_type:

Wall Mount

unit:

hertz

refresh_rate:

60