Is it this one?
https://www.neweggbusiness.com/Product/Product.aspx?Item=9B-24-106-004&nm_mc=KNC-GoogleBiz-PC&cm_mmc=KNC-GoogleBiz-PC-_-pla-_-Monitors+-+LCD+Flat+Panel-_-9B-24-106-004&gclid=CjwKEAjwz4u9BRCbioK3stnBznESJADA75xbhC60QtQFfaazLJTip0MXvFPZLAAbOkdXyCOy7birZxoCDLjw_wcB
There are a number of "XB271H" monitors. Do you have the exact model number/version? E.g., https://www.amazon.co.uk/gp/product/B01AJTVBU4 is exact model "UM.HX1EE.011" or "XB271H bmiprz". Is that the one you have perhaps?